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Trek Checkpoint Bikes Compared: Which One to Choose?

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I’ll help you navigate the Trek Checkpoint gravel bikes in this article by comparing Checkpoint ALR 5 to SLR 9 .

You will also learn:

• Who are they best suited for?
• What are the differences between each model?
• And which model gives you the best value for your money?

KEY TAKEAWAY

Trek Checkpoint bikes are ideal for on and off-road adventures. They are more terrain-oriented but heavier than the Trek Domane family . The models differ in components (e.g., electronic shifting) and frames. The more expensive ones are usually lighter and have a higher-grade carbon frame, but usually diminishing returns.

Let’s dive deeper to help make your decision easier.

Trek Checkpoint ALR 5 to SLR 9

The following table summarizes the main differences between all Checkpoint bikes.

Checkpoint Pros & Cons Summary

I summarized the pros & cons of the Checkpoint series below.

Checkpoint Pros

• Wide tire clearance (up to 45mm, 700c)
• Aluminum and carbon models are available
• Versatility
• Relatively aggressive geometry
• Downtube protector
• Availability in multiple sizes and colors
• Mounts for additional accessories
• Integrated cable routing
• Lifetime warranty

Checkpoint Cons

• Slower than Madone and heavier than Émonda gravel bikes
• Relatively expensive

Checkpoint Main Features

Let me now explain the most important features of the Trek Checkpoint gravel bikes.

Frame and Geometry

The Checkpoint bikes are part of Trek’s gravel bikes lineup (together with Trek Domane ). Depending on the price range, they’re made of aluminum or carbon .

The names of the bikes have abbreviations that refer to the type of material used for the frame:

• ALR  are  aluminum  frame bikes.
• SL are bikes with 500 series OCLV*  carbon (mid-range).
• SLR are bikes with 800 series OCLV carbon (high-end).

*OCLV carbon is Trek’s patented carbon fiber process ( learn more ).

ALR Checkpoints are great for beginners because they are the most affordable. However, they are more expensive than competitors ( gravel bikes for under $3000 ).

SLs are the best mid-range option. They are lighter than ALs but heavier than SLRs. But they are much more expensive than ALs and more affordable than SLRs.

And finally, SLRs are the most high-end, which results in lower weight but higher price.

Most Checkpoints are available in 49-61 sizes, so whether you are short or tall, you should find a size that will suit you.

They are also available in multiple colors to suit your liking. However, they differ depending on the specific model.

Their geometry is aggressive compared to other all-road gravel bikes. The following picture shows the comparison with Trek Domane endurance road bikes .

Checkpoints have longer reach and are generally more suited for an aggressive riding position and, therefore, racing and performance-oriented riders.

However, they are also suitable for bikepacking or commuting.

Weight & Aerodynamics

Trek Checkpoint frames are heavier than Trek road bikes (Madone, Émonda, Domane) . This is especially due to their thicker tubes, frame protectors, and hidden storage compartments. They weigh around 9 kg (20 lbs).

Naturally, they are not as aero oriented as Madones . They resemble Trek Domanes, which means they balance weight, stiffness, durability, and aerodynamics.

However, no wind tunnel testing data are available.

Wheels and Tires

Most low- to mid-range Checkpoint models come with Bontrager Paradigm SL (or Comp) aluminum wheels. More expensive models have carbon wheels, like the Bontrager Aeolus Pro. This is another similarity with the Trek Domane lineup .

Fortunately, all the wheels are tubeless-ready. Just make sure that the model you choose has tubeless tires if this feature matters to you.

Checkpoint bikes are known for their wider tire clearance compared to Domane. They can fit up to 45mm tires with 700c wheels and up to 2.1″ tires with 650b wheels.

Such wide tires will allow you to tackle light to rough gravel, broken forest roads, and many other terrains inaccessible on the road or hybrid bikes.

Trek Checkpoint bikes have mostly 1X, but some models have 2X drivetrains.

Trek mostly uses SRAM groupsets, but some have Shimano GRX. The number in the bike name indicates the groupset.

• Models ending with 5 use Shimano GRX  (RX600/810) groupset.
• Models ending with 5 use SRAM Rival AXS groupsets.
• Models ending with 7 use Shimano GRX (RX810) or SRAM Force AXS groupsets.
• Models ending with 9 use SRAM Red AXS groupsets.

Checkpoints with SRAM are lighter than Checkpoints with Shimano but are more expensive.

TIP : You might also be interested in this comparison of Shimano vs. SRAM .

Unlike the Émonda and Madone, Trek Checkpoint bikes have racks and fender mounts , making them a better choice for bike packers.

Additionally, they offer hidden storage compartments for extra storage capacity, which is larger than on Domane road bikes.

Lastly, Checkpoints have a frame protector to protect the downtube against rock strikes and flying rocks.

So, which Trek Checkpoint bike is the best?

If you’re considering buying a Checkpoint, I suggest AL 5 Driftless for its unique paint job and bike-packing-oriented accessories.

The SL models offer a better price-value ratio than SLRs but are slightly heavier (also due to the heavier wheels).

But still, if you don’t have money burning a hole in your pocket and don’t count every second, the SL models (especially the SL 6 AXS) offer better value.

Trek Checkpoint FAQ

Trek Checkpoint bikes are for gravel racers, bike packers, and those who don’t want to limit themselves to paved roads only. Their wide tire clearance and gravel-specific features make them suitable for various terrains, including rough gravel.

The main difference between Checkpoint and Domane is that Checkpoint is a pure-blood gravel bike thanks to the wider tire clearance and a few gravel-specific features. Trek Domane is an endurance road bike with narrower tire clearance. For more detailed info, please check out my comparison of Checkpoint vs. Domane .

Yes, you can customize the color of your Trek Checkpoint using the Project One program. However, it’s only available for the highest-end frames (SLR).

About The Author

Petr Minarik

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The New Trek Checkpoint Line Is For Gravel Riders of All Kinds

Updated geometry and differentiated models for speed, adventure, and all purpose riding

The Takeaway: A great bike gets better, with geometry updates suited to the evolution of gravel.

• Two centimeters longer reach and front center on all sizes
• One centimeter longer chainstays
• New race-oriented SLR platform
• Additional cargo mounts

Price: $12,000 (SLR 9, as tested) Weight: 17.8 lb. (Size 54cm)

Buy Now View Gallery

Trek’s gravel loving Checkpoint is all new front to rear, with new geometry (covered below) and features for the ever-evolving world of gravel riding. That evolution is why Trek differentiated the three complete bike platforms—SLR, SL, and ALR—for different kinds of gravel riders. I go into more depth below, but the short version is: SLR = race; SL = all-around, ALR = utility.

Cargo and bags are a big part of the gravel experience, so the new Checkpoint has frame bag mounts inside the front triangle. This mates up with a new direct mount Bontrager frame bag—a unique bag for every Checkpoint size—that’s part of that brand’s new Adventure Bag collection . The frame also has a mount for a top tube bag. All sizes of the Checkpoint have a bottle mount under the downtube, a bottle mount on the seat tube and at least one on the downtube: Sizes 54cm and up have two bottle mounts on the downtube. SL and ALR models get three pack mounts on the fork for additional water or cargo capacity. Hoses and housing run internally, which keeps them out of the way of straps and bags. All models get mudguard mounts as well. SL and SLR frames get in frame storage similar to the third generation Domane .

Threaded T47 bottom brackets now grace all Checkpoint frames, but Trek has done away with the sliding dropouts found on the previous generation Checkpoint. All eight builds get gravel gearing and clutch-style rear derailleurs (Shimano GRX or SRAM eTap AXS), as well as 40mm tubeless ready tires and tubeless ready rims. All models, and all sizes, can fit up to 45mm tires with plenty of mud clearance; which means riders in dry conditions can fit in even bigger tires. If you choose, you can fit the Checkpoint with 650b wheels—all models and all sizes come stock with 700c wheels—which bumps tire clearance up to 53mm (2.1 inches).

In the press release, Trek makes mention of “ Émonda -inspired aero tube shapes,” without providing any wind tunnel data. My suspicion is the tube shapes do save a few watts, though Trek isn’t leaning into gravel aero as much as 3T does with its Exploro RaceMax .

Trek Checkpoint — Geometry

Geometry is where the new Checkpoint sees the biggest change. While there are three Checkpoint frame platforms (outlined below), all three share the same, all new, geometry (see table above).

The overall theme to the geometry updates is “more progressive.” Trek took a page from the mountain bike playbook and stretched all sizes of the frame’s reach and front center by about two centimeters. Trek now fits shorter stems and shorter-reach bars to mitigate cockpit length changes. Chainstays on the frame grow by a centimeter (now 435mm on all sizes). Trail is also longer (about six millimeters) even though head angles remain about the same—new fork offset is 45mm, old was 49mm—and wheelbase grows as well. Frame stack bumps up a touch too.

Jordan Roessingh, Trek’s director of road product, says the new geometry aids stability, “It’s a longer bike, so whether you’re doing long Unbound type stuff where you’re just pointing the bike straight or you’re doing high speed stuff on gravel descents in the mountains, we believe this geometry lends itself to confidence. Getting that wheel out in front of you also unweights it makes you feel a lot more confident when you’re doing steep technical stuff—you don’t feel like you’re going to go over the bar. That front wheel is really easy to unweight and allows it to roll over a lot more stuff.”

Roessingh further explained that the new geometry also reduces toe overlap on smaller sizes and allows them to approve larger tires sizes for smaller riders, “On the previous [Checkpoint] we had to limit our small frame size tire size recommendations to only 40mm. Not because the frame didn’t have the capacity for 45, but when you put a 45 it created too much toe overlap.” The issue here was government regulations that outline a production bike’s maximum tire overlap. But with the new bike’s longer front end every size can, officially, run up to a 45mm tire.

One note on the geometry: The new Checkpoint is not suspension fork corrected. However, the Checkpoint has a 1.5-inch lower fork steerer diameter, so you can fit the new RockShox Rudy , a Suntour GVX, or Fox AX, but doing so will raise the front end and slacken its angles.

Trek Checkpoint — Where is the Front IsoSpeed?

One surprising omission from the new Checkpoint is IsoSpeed in the front, a feature found in Trek’s Domane all road bikes . According to Roessingh, IsoSpeed on the front of a bike with big tires, “Doesn’t provide a sufficient gain in compliance to make a real difference to the rider because a [larger than 32mm tire] is such a dominant aspect of the compliance,” so it was left off the new Checkpoint. The benefit is a less complicated front end, and some weight savings.

Rear IsoSpeed continues on all models. Roessingh explains that it has more deflection than front Isospeed so it offers additional compliance benefit even with larger tires.

Trek Checkpoint — Three Frame Platforms

The new Checkpoint comes in three platforms: SLR, SL, and ALR. The top of the line SLR (super light race) platform is new to the Checkpoint line. Previously, Checkpoint topped out with the SL model. All the models have T47 threaded bottom bracket, internal hose and housing routing, 45mm tire clearance, frame bag mounts, fender mounts, and come in six sizes: 49 to 61cm. SLR and SL carbon frames get the same in-frame storage system found on carbon Domane frames.

But though the three platforms share geometry and many features, they’re tuned to suit different riders.

The SLR is race oriented, so it gets the highest-grade carbon composite, a traditionally shaped (not flared) road bar, and forgoes cargo mounts on the fork. This model also has Trek’s no-cut seat mast with (non-adjustable) top tube IsoSpeed.

The SL gets an all-purpose gravel focus. It uses lower grade carbon than the SLR but adds adventure riding features like three-pack mounts on the fork legs, and a flared gravel bar. This model does have Trek’s IsoSpeed decoupler in the seat tube but fits a traditional 27.2mm seatpost: That makes this model dropper-post compatible.

The aluminum framed ALR is the least expensive of the new Checkpoints, and Trek’s representatives expect this to be a popular model with riders looking for a commuter or utility bike. It has the same geometry as the other platforms, and the same rack, fender, framebag and mudguard mounts as the Checkpoint SL, and it gets a flared gravel bar and 27.2mm dropper-post compatibility. The two features it lacks relative to the SL are the in-frame storage and an IsoSpeed decoupler.

Trek Checkpoint — Models, Prices, Weights

There are eight complete bikes for the USA: one ALR, three SL, and four SLR models. Prices and claimed weights are below, with a quick look at the build kits. All complete bikes roll on Bontrager GR1 40mm tubeless ready tires, have tubeless ready rims, and ship with tubeless valves, rim strips, and sealant.

• Checkpoint ALR 5— $2,400, 21.5lb. Shimano GRX600 2x11 with 30/46 rings and 11-34 cassette
• Checkpoint SL 5—$3,200, 21.3lb. Shimano GRX600 2x11 with 30/46 rings and 11-34 cassette, Bontrager Paradigm SL wheels (21mm internal width)
• C heckpoint SL 6 eTap — $4,100, 20.0lb. SRAM Rival eTap AXS 1x12 with 40 ring and 10-44 cassette, Bontrager Paradigm Comp wheels (25mm internal width)
• Checkpoint SL 7 eTap—$6,3,00 19.6lb. SRAM Force Wide eTap AXS 2x12 with 30/43 rings and 10-36 cassette, Bontrager Aeolus Pro 3V carbon wheels (25mm internal width)
• Checkpoint SLR 6 eTap—$7,600, 19.1lb. SRAM Rival eTap AXS 1x12 with power meter, 40 ring and 10-44 cassette, Bontrager Aeolus Pro 3V carbon wheels (25mm internal width)
• Checkpoint SLR 7—$8,300, 19.4lb. Shimano GRX815 2x11 with 31/48 rings and 11-34 cassette, Bontrager Aeolus Pro 3V carbon wheels (25mm internal width)
• Checkpoint SLR 7 eTap—$8,300, 18.6lb. SRAM Force eTap AXS 1x12 with power meter, 40 ring and 10-44 cassette, Bontrager Aeolus Pro 3V carbon wheels (25mm internal width)
• Checkpoint SLR 9 eTap—$12,000, 17.9lb. SRAM Red eTap AXS 1x12 with power meter, 40 ring and 10-44 cassette, Bontrager Aeolus RSL 37V carbon wheels (25mm internal width)

Trek Checkpoint — Ride Impressions and Review

Trek sent me the top-of-the-line SLR 9 eTap AXS well ahead of the bike's launch, and I’ve done my usual “gravel” shenanigans on this bike—long gravel rides, mixed media rides, some road riding, and plenty of singletrack.

On anything dirt, and especially on singletrack, the new Checkpoint is not just better than the previous generation, it’s one of the best gravel bikes I’ve been on. I love the previous generations above-average comfort and smoothness and that’s still present, but the geometry updates make the new bike much more capable: And the faster and more technical the dirt, the more the geometry pays off. It’s accurate, but not darty, and composed but appropriately flickable.

Here’s the rub: Give us geometry that lets us go faster and…we’re going to go faster. The Checkpoint is so damn fast on downhills singletrack that I take issue with Trek’s decision to forgo front IsoSpeed or correct the geometry for a suspension fork. I mean, this is a pretty compliant bike overall, but when you go faster the hits get stronger. Many times I wacked stuff that made my hands and arms stung. Bigger tires help, but a 45mm maximum isn’t that big (Canyon’s Grizl fits 50s, for example).

Basically, there were times I felt like the geometry was writing checks the Checkpoint couldn’t cash without some help from suspension. But then, when you add weighty suspension and fatter tires, you have a much different bike; so I’m also not sure that’s the answer. I think we’re at a very interesting point with “progressive” gravel bikes where they are tickling the edges of mountain bike capability and, if they go much further, suspension must be a part of the conversation.

On the flip side of the new Checkpoint’s added capability, it feels less chipper on paved surfaces. The old Checkpoint was almost a road bike that could do gravel while the new one definitely takes cues from the world of mountain bikes. On balance, this works out okay for the most fun and challenging parts of gravel rides, though the Checkpoint bike feels a bit logy on the liaisons between the best bits. That’s a compromise I’m okay with, but if you want more quickness on pavement from your gravel bike you might be happier on something like a Cervelo Aspero 5 or the 3T Exploro Racemax .

Trek isn’t breaking any new ground with the Checkpoint’s geometry and handing traits. This mountain bike influenced longer, more stable, geometry (oh, hello, Chamois Hagar ) is an increasingly popular trend, and already found in bikes like Canyon’s Grizl (which the Checkpoint reminds me of) and some other bikes. I’m curious to see how this geometry goes down with the general riding public, and how far brands push the geometry. When used for actual gravel and off-pavement riding and racing, this geometry makes sense. But if riders are buying gravel bikes because they want more capability and comfort out of a drop bar bike, but are mostly sticking to pavement, I don’t think this geometry suits that kind of rider.

Handling covered, let’s look at the rest of the Checkpoint’s attributes. The added cargo options (in frame storage, direct mount bag in main triangle) are great, almost mandatory, features for a gravel bike. My 54cm frame did have two water bottle mounts on the downtube, but it required a bit of trial and error with a Wolf Tooth B-Rad base to get two bottles to fit comfortably. With the Bontrager frame bag mounted, I needed to reposition the seat tube cage location to fit a bottle. Larger sizes have more space in the main triangle, so this won’t be an issue, but riders on frames smaller than 54 might need to look into alternative ways to carry water if they run the frame bag.

I do have a gripe with the road-bend bar on the SLR models. Trek sees this model as appealing to racers who are coming from a road background. This is why it gets a traditional, and lighter, road bar. But it’s still a gravel bike, and flared drops are awesome for comfort and control. Besides, flared bars are so awesome that once you ride them, you’ll want to put them on your road bikes. Thankfully, Trek didn’t do anything weird with the bar and stem on the new Checkpoint, so riders can fit anything they desire.

That’s my only gripe though. I love this bike, and the rest of the parts kit is dialed. I’m going to throw out special kudos for spec'ing the SRAM-equipped SLR models with power meters from the factory. I think that’s perfectly in line with this bikes purpose and customer.

Overall, the new Checkpoint is a wonderful gravel bike. It’s faster, better handling, and more suited to the needs of the today’s gravel rider.

Trek Checkpoint SLR 9 eTap

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A gear editor for his entire career, Matt’s journey to becoming a leading cycling tech journalist started in 1995, and he’s been at it ever since; likely riding more cycling equipment than anyone on the planet along the way. Previous to his time with Bicycling , Matt worked in bike shops as a service manager, mechanic, and sales person. Based in Durango, Colorado, he enjoys riding and testing any and all kinds of bikes, so you’re just as likely to see him on a road bike dressed in Lycra at a Tuesday night worlds ride as you are to find him dressed in a full face helmet and pads riding a bike park on an enduro bike. He doesn’t race often, but he’s game for anything; having entered road races, criteriums, trials competitions, dual slalom, downhill races, enduros, stage races, short track, time trials, and gran fondos. Next up on his to-do list: a multi day bikepacking trip, and an e-bike race. 

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Trek Checkpoint

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Trek Checkpoint for sale

The Trek Checkpoint, an adventurous Trek gravel bike, is the perfect bike for winning gravel races, enjoying fast-paced bikepacking trips, and riding wherever the heck you'd like to.

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Shop new & used Trek Checkpoint bikes at TPC - The Pro's Closet. Find reviews, specs, weight info, and prices on various models (SL 6, ALR 5) and popular years (2021, 2022 etc). Read our Trek Checkpoint Quick-Take review below.

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Checkpoint ALR 5 - Weight, Specs, Price

2022 trek checkpoint review - a tpc quick-take.

• Versatility galore: Trek has made the Checkpoint an adaptable machine. With tire clearance up to 45mm, it's eager to take on various terrains.
• Integrated mounts: Whether it's a multi-day bikepacking trip or a quick morning spin, the multiple mounts for bags, bottles, and racks mean the Checkpoint is always adventure-ready.
• IsoSpeed decoupler: Borrowed from its Domane sibling, this tech ensures the Checkpoint offers a smoother ride on those jarring gravel routes, reducing fatigue and upping the comfort quotient.
• Weight concerns: For all its merits, the Checkpoint isn't the lightest gravel bike on the block. This extra heft might make those uphill grinds a tad more challenging.
• Price point: Top spec models, with their advanced features, veer into the premium price range. Casual riders might find it hard to justify the investment.
• Not truly race-oriented: While it handles gravel and trails with aplomb, it's not the most aggressive for racing. Those looking for a sharper, race-focused gravel bike might find the Checkpoint tame.
• Complexities for some: The Checkpoint's array of features could be overwhelming for those seeking a simpler, straightforward gravel experience.

Bottom Line:

Trek Checkpoint ALR 5 review – a confident, capable gravel bike

Trek's updated aluminum checkpoint is a surefooted, confidence-inspiring ride that's perfect for ruined back lanes, byways and well-laden travels.

Bike Perfect Verdict

The reshaped Checkpoint frame neatly combines confidence-inspiring stability with a fun, engaging feel which goes well at all speeds on all sorts of surfaces. This might not be the lightest or fanciest build, but the key bits are great and the rest just quietly works.

Stable and predictable

Comfortable

Great shifting and brakes

Gearing a bit tall for the weight

Could use a dropper post

Why trust BikePerfect Our cycling experts have decades of testing experience. We\'ll always share our unbiased opinions on bikes and gear. Find out more about how we test.

The aluminium-framed ALR models sit at the bottom of Trek's Checkpoint range, with the lighter carbon SL and race-focused SLR bikes above, but in truth that's not a bad place to be. The ALR 5 gets a full set of excellent Shimano GRX components for the drivetrain and brakes, decent tires on tubeless-ready rims and lots of rack and fender mounts. 

The result is a surefooted, confident bike that's ready for exactly what Trek says it's for – gravel riding for fun, commuting or just general adventures. Which is pretty much what most people are after when looking for the best gravel bikes or best cheap gravel bikes .

Design and geometry

For 2023, the Checkpoint frame has seen some changes – basically it's got longer both in the front centre and the chainstays, and the stem is shorter to compensate. I tested a 58cm, and compared to the 2021 model it has 10mm longer chainstays, 20mm more reach and is 26mm longer overall. The 90mm stem and 60.9cm/41.1cm stack and reach figures keep the overall riding position fairly relaxed, with a usefully tall front end and slightly head-down, but certainly not front heavy, bias.

The head angle is the same as before at 72.3 degrees, presumably to keep the steering decently snappy, as is the bottom bracket drop at 7.4cm. 

This might be the 'poor man's' model with its humble alloy frame, but that doesn't mean it's unsophisticated. The various touring-friendly mounts are complimented by internally-routed cables that help a lot when strapping on frame bags or cages, as well as keeping them generally out of harm's way. I did find several of the bungs protecting the mounting/cable holes disappeared overboard on rough trails though, so if you want to keep filth out of your threads/frame you might want to stock up – or wind in some actual bolts where you can.

Components and build

Trek has spent the budget wisely here, speccing the excellent Shimano GRX shifters, levers and hydraulic brakes. The flat-fronted levers are particularly good for grip when it's rough, the shifts are always positive and the two-piston calipers are powerful and easy to modulate on the 160mm discs. Basically, the whole stop and go thing is covered perfectly.

Well, almost perfectly. The 2x11 drivetrain gives a very useable spread of ratios, but for the most serious off-road climbing it's a little high. At the top end it's good for 35mph before you spin out, which is great for the road and fireroad descents, but leaves the lowest gear (30/34t) slightly high for the steepest, techiest climbs. That's especially true if the bike's loaded up.

That's the lowest combination of ratios that will fit, though, so your options there are either to keep the bike as light as possible, fit a 1x crank and lose a fair bit of top speed, or get stronger...

The finishing kit is all in-house Bontrager stuff, and while it's all perfectly good they're pretty easy targets for weight loss upgrades. The Bontrager Elite Gravel bar is 44cm wide on this frame size with a good flare to the drops for extra leverage, and the comfy GRX hoods tilt inwards just enough to encourage a slightly elbows-out stance that's good for control.

The wheels – Switch hubs, 21mm wide Paradigm rims (the SL version on one end, presumably the front) and 24 spokes on each – are similarly utilitarian, being strong, middling for weight and entirely decent for the job. Wearing Aeolus XXX rim strips they're tubeless ready, and so are the Bontrager GR1 Team Issue tires, which is nice – in fact, Trek lists 6oz of its TLR sealant as a 'tire part,' so presumably consumer bikes are supplied already set, just as our test bike was.

The tires are predictable and confidence inspiring on the unusually dry terrain of our test period, as well as on tarmac both damp or dry, but are clearly not designed for mud. There's room in the frame for up to 45mm rubber should you want to go wider.

Oh, and while the front axle looks like you'll need to carry a hex key to get it out, the lever on the rear thru-axle actually pulls out to fit in either one. 

Performance

The Checkpoint has a confident feel – its length and reasonable heft keep it planted, while the steering is stable without being sluggish. It's the same whether you're on gravel or tarmac, and predictable in a friendly but not boring way. The chunky headtube and sizeable welded junctions do a great job of keeping it tracking where it's pointed in the rough.

Despite the chunky, almost box-section seatstays and generally rigid-feeling frame, it's comfortable for long rides, thanks to the high volume tyres, well-cushioned bar tape and a supportive, hammocky P3 Verse Comp saddle you really sit 'in'.

Get up some speed on gravel though and there's no disguising the aluminum build. By 30mph on a fireroad, your hands and feet are taking some serious vibes, and the chatter from sustained speed does reduce comfort. 

Switching to carbon at the bar (and at the Bontrager seatpost) would both increase comfort and reduce weight, and though I found the saddle supportive and comfy both for long rides and hard pedaling efforts, it does have steel rails – it's another easy and relatively cheap target for weight loss and vibe reduction.

Alternatively, if you want more speed whatever the trails do, fit the best dropper post that will suit the 27.2mm seat tube and reap the rewards.

Personally, I would have quite liked the shorter cranks of the smaller sizes instead of the 175mm GRX RX600s fitted here, which would allow an even lower BB for descending confidence, but that's really just preference. The 7.4cm BB drop is pretty low in the scheme of things, cornering feel is predictable, and ground clearance is good.

This is an extremely usable yet still very enjoyable bike. It nails that '2/3rds road bike, 1/3rd XC bike' feel that makes gravel bikes so good for so many things – commuting while avoiding the worst traffic, touring, exploring dilapidated rural lanes, getting in hard climbing efforts away from ANY traffic, or just generally getting out there and enjoying the view. 

It's comfortable and reassuring from the off whatever the surface, and the money's been spent in the right places – this is a really solid base for years of riding fun.

Test conditions

• Temperature: Rarely less than 20 degrees C and up to 35
• Conditions: Dry, hard and dusty with almost zero rain
• Trails: Mountain singletrack, bridleways, forest gravel and crumbling rural lanes

Tech specs: Trek Checkpoint ALR 5

• Price: $2,500 / £2,400
• Discipline: Gravel
• Frame size tested: 58cm
• Seat tube angle: 72.5°
• Head angle: 72.3°
• Effective top tube: 59.7cm
• Bottom bracket drop: 7.4cm
• Wheelbase: 105.8cm
• Reach: 41.1cm
• Frame: 300 Series Alpha Aluminium
• Tires: Bontrager GR1 Team Issue 40mm, Tubeless Ready 
• Drivetrain: Shimano GRX
• Sizes: 49, 52, 54, 56, 58 (tested), 61cm
• Claimed weight: 9.75 kg / 21.5 lb (56cm)

Steve is a highly experienced journalist and rider who's been involved with bikes of all kinds for more years than he would care to remember. Based in South Wales, he has mile upon mile of swooping singletrack, an array of plummet and winch descents and everything in between right on his doorstep.

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"An excellent gravel race bike"

"Trek's new Checkpoint SLR 9 eTap is an excellent gravel race bike, built with features and geometry that calm rough surfaces without the handling feeling vague or sluggish. After two months on it, I can say that the bike we named the 2021 VeloNews Bike of the Year has only gotten better."

"What Trek gets right with the Checkpoint is the handling, the comfort, the storage options, and the flexibility to alter the cockpit or the drivetrain. The attention to detail...is welcome and warranted for a top-end machine."

"One of the best gravel bikes I’ve been on"

"Overall, the new Checkpoint is a wonderful gravel bike. It’s faster, better handling, and more suited to the needs of the today’s gravel rider."

"More capable….easier to ride on fast on unpaved surfaces"

"As with other bikes with similarly long front ends, the revamped Checkpoint is easier and more confidence-inspiring to ride off-road on even moderately steep or loose terrain than before."

"Progressive geometry and frame storage"

"Trek has revamped its Checkpoint line-up, with the updated gravel bike coming in not one but three different flavours, catering for the needs of go-fast racers, rough-and-ready adventurers and riders looking for a versatile N+1."

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