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 47% 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 £99.99 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.
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.
Trek Checkpoint ALR 4 Disc Gravel Bike 2021
Versatile and highly capable, Trek’s Checkpoint ALR 4 Disc Gravel Bike has the ability to take on commuting duties and exploratory adventures with equal aplomb. The 300 Series Alpha Aluminium frame has lots of options for mounting luggage and bottle cages for long rides and also has mudguard mounts for everyday trips. Internal cable routing keeps them out of harm’s way and helps the bike’s svelte lines whilst the Stranglehold Dropout design gives the option to customise the geometry or even run a single-speed setup.
Shimano’s 10-speed GRX groupset provides both the drivetrain and the hydraulic disc brakes, ensuring that speed and cadence can be easily controlled regardless of how laden down the bike is with bikepacking luggage. 700c wheels mean that it rolls well over rough ground, with the 40c Bontrager GR1 Comp tyres a good all-round option, although the frame has clearance for 45mm rubber if more comfort or grip is required.
Please note, the accessories shown are for illustration only and not included.
Highlights
- Trek 300 Series Alpha Aluminium frame with Control Freak internal routing, Stranglehold dropouts and rack and mudguard mounts
- Trek Checkpoint carbon fork with rack and mudguard mounts
- Shimano GRX hydraulic disc brakes
- Shimano GRX 10-speed mechanical groupset
- Bontrager 700c wheelset with Bontrager GR1 Comp tyres
Technical Specification
| Frame | Trek 300 Series Alpha Aluminium, tapered head tube, Control Freak internal routing, 3S chain keeper, rack and mudguard mounts, flat mount disc, Stranglehold dropouts, 142x12mm thru-axle |
| Fork | Trek Checkpoint carbon, tapered carbon steerer, rack mounts, mudguard mounts, flat mount disc, 12x100mm thru-axle |
| Headset | FSA Integrated, sealed cartridge bearing, 1-1/8" top, 1.5" bottom |
| Bottom Bracket | Shimano RS500, 92mm, PressFit |
| Stem | Bontrager Elite, 31.8mm, Blendr compatible, 7 degree |
| Handlebar | Bontrager Elite IsoZone VR-CF, alloy, 31.8mm, 93mm reach, 123mm drop |
| Front Brake | Shimano GRX hydraulic disc, flat mount |
| Rear Brake | Shimano GRX hydraulic disc, flat mount |
| Brake Levers | Shimano GRX hydraulic disc |
| Front Derailleur | Shimano GRX RX400, braze-on |
| Rear Derailleur | Shimano GRX RX400, long cage, 36T max cog |
| Shift Levers | Shimano GRX RX400, 10-speed |
| Cassette | Shimano Tiagra HG500, 11-34, 10-speed |
| Crankset | Shimano GRX RX600, 46/30t |
| Front Wheel | Bontrager alloy, sealed bearing, Centre-Lock disc, 100x12mm thru-axle hub with Bontrager Tubeless Ready, 28-hole, 17mm width, Presta valve rim |
| Rear Wheel | Bontrager alloy, sealed bearing, Centre-Lock disc, Shimano 11-speed freehub, 142x12mm thru-axle hub with Bontrager Tubeless Ready, 28-hole, 17mm width, Presta valve rim |
| Front Tyre | Bontrager GR1 Comp, wire bead, 60 TPI, 700x40c clincher |
| Rear Tyre | Bontrager GR1 Comp, wire bead, 60 TPI, 700x40c clincher |
| Saddle | Bontrager Montrose Comp, steel rails, 138mm width |
| Seatpost | Bontrager Approved, alloy, 27.2mm, 8mm offset |
| Pedals | Available to be purchased separately |
| Claimed Manufacturers Weight | 10.26kg size 54cm |
Built, Checked, Tuned and Tested
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.
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