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Description
The Trek Checkpoint ALR 4 Gen 3 Gravel Bike is an aluminium gravel bike designed for riders looking to explore beyond the tarmac. Its modern endurance geometry delivers stability and comfort on rough terrain, while generous tyre clearance up to 50 mm offers extra grip and control on loose surfaces.
Fitted with an 11-speed Shimano CUES 8000 drivetrain, hydraulic disc brakes and Bontrager Paradigm wheels, it provides smooth shifting and confident stopping power. A lightweight carbon fork helps reduce road buzz, and multiple mounts for bags and accessories make it a practical choice for bikepacking, long adventures or weekend escapes.
Frame | 300 Series Alpha Aluminium, internal cable routing, 3S chain keeper, T47, UDH, rack and mudguard mounts, integrated frame bag mounts, flat-mount disc, 142x12 mm chamfered thru axle |
Fork | Trek Checkpoint, full carbon, tapered steerer, rack mounts, fender mounts, flat mount disc, 12x100 mm thru axle |
Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 125 kg (275 lb) |
Shifter | Shimano CUES U6030, 11-speed |
Rear derailleur | Shimano CUES U8000 GS |
Crank | |
Size - XS, S, Shimano CUES FCU60301, 40T ring, 165 mm length | |
Size - M, ML, Shimano CUES FCU60301, 40T ring, 170 mm length | |
Size - L, XL, Shimano CUES FCU60301, 40T ring, 172.5 mm length | |
Bottom bracket | Praxis, T47 threaded, internal bearing |
Cassette | Shimano CUES LG700, LINKGLIDE, 11-50, 11-speed |
Chain | Shimano LG500 |
Hub front | Bontrager alloy, sealed bearing, CentreLock disc, 100x12 mm thru axle |
Skewer front | Bontrager Switch chamfered thru axle, removable lever |
Hub rear | Bontrager alloy, sealed bearing, CentreLock disc, Shimano 11-speed freehub, 142x12 mm thru axle |
Skewer rear | Bontrager Switch chamfered thru axle, removable lever |
Rim | Bontrager Paradigm 23, Tubeless Ready, 24-hole, 23 mm width, Presta valve |
Spokes | 14 g stainless steel, black |
Tyre | Bontrager Girona Pro, Tubeless Ready, GR puncture protection, aramid bead, 60 tpi, 700x42 mm |
Tyre part | Bontrager TLR sealant, 180 ml / 6 oz |
Max tyre size | 50 mm without mudguards, 42 mm with mudguards (as measured, see manual for details) |
Saddle | Verse Short Comp, steel rails, 145 mm width |
Seatpost | Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length |
Handlebar | |
Size - XS, S, Bontrager Elite Gravel, alloy, 40 cm width | |
Size - M, ML, Bontrager Elite Gravel, alloy, 42 cm width | |
Size - L, Bontrager Elite Gravel, alloy, 44 cm width | |
Size - XL, Bontrager Elite Gravel, alloy, 46 cm width | |
Handlebar tape | Bontrager Supertack Perf tape |
Stem | |
Size - XS, Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length | |
Size - S, M, Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 80 mm length | |
Size - ML, L, Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90 mm length | |
Size - XL, Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 100 mm length | |
Brakes | Shimano CUES hydraulic disc, flat mount |
Brake rotor | Shimano RT54, CentreLock, 160 mm |
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.
Size Guide
Delivery & Returns
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Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
Save up to 42% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.
Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service $132.00 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
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Important Update for Our Canadian Customers
We regret to inform you that shopping on Sigma Sports is temporarily unavailable for customers based in Canada.
We understand how disappointing this may be and sincerely apologize for any inconvenience caused. Please rest assured that we are actively exploring solutions to resume service and find the best way to support our Canadian community.
We appreciate your patience and understanding during this time, and we look forward to welcoming you back as soon as possible.
If you require any further assistance, please reach out to the customer services team
— The Sigma Sports Team