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.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
We've partnered with PedalSure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and claim.
Trek Domane SL 4 Disc Road Bike 2021
Versatile, fast and comfortable; introducing the Trek Domane SL 4 Disc Road Bike. A popular choice for riders looking to put in the miles in a slightly more relaxed position, the frameset has had a range of updates. The 500 Series OCLV carbon tubes have a more aerodynamic shape while cables are internally routed, significantly cutting drag. Improvements to the front and rear IsoSpeed mean that road buzz is more effectively absorbed and potential fatigue reduced.
Now taking up to 38mm tyres, you'll get incredible comfort even when the roads are rough. Fix mudguards to the hidden mounts and you'll still be able to fit 35c tyres. Another highlight is the frame integrated storage, so you can now carry more or keep your pockets lighter. Use the Bontrager Integrated Tool System (BITS) (purchased separately), and you can stow an inner tube, tyre levers and CO2 inside the downtube, as well as a BITS multitool (purchased separately) in the storage door.
This Domane SL has been built up with Shimano Tiagra hydraulic disc brakes and drivetrain so you can benefit from increased control at speed, and excellent reliability. The wheel and 32mm tyre combination is perfect for training and long rides alike, being robust, puncture-resistant and fast rolling.
- Aerodynamic tube shapes
- Trek 500 Series OCLV carbon frame
- Front and rear IsoSpeed for the ultimate in vibration damping, smoothing even the roughest roads
- Internal cable routing
- Hidden mudguard mounts
- Clearance for 38mm tyres (35mm with mudguards)
- Shimano hydraulic disc brakes
- Integrated frame storage - the Bontrager Integrated Tool System (BITS) (purchased separately) stores a tube, tyre levers, CO2 and CO2 head neatly inside the downtube
- The bottle cage sits on an easy-open storage door and holds a BITS multi-tool (purchased separately) giving riders quick access for mechanical adjustments
- Integrated Flare tail-light mount
- To use the BITS Integrated Tool System you will need to additionally purchase the Bontrager BITS Bag and Bontrager BITS Integrated Multi-Tool
|Frame||Trek 500 Series OCLV carbon, front and rear IsoSpeed, BITS internal storage, tapered head tube, internal cable routing, micro-adjust seat mast, 3S chain keeper, DuoTrap S-compatible, mudguard mounts, flat-mount disc, 142x12mm thru-axle|
|Fork||Trek Domane SL carbon, tapered carbon steerer, internal brake routing, mudguard mounts, flat-mount disc, 12x100mm thru-axle|
|Headset||FSA Integrated, sealed cartridge bearing, 1-1/8" top, 1.5" bottom|
|Bottom Bracket||Praxis Works, T47 threaded, internal bearing|
|Stem||Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree|
|Handlebar||Bontrager Comp VR-C, alloy, 31.8mm|
|Front Brake||Shimano Tiagra R4770 hydraulic disc|
|Rear Brake||Shimano Tiagra R4770 hydraulic disc|
|Brake Levers||Shimano Tiagra R4720|
|Front Derailleur||Shimano Tiagra 4700, braze-on|
|Rear Derailleur||Shimano Tiagra 4700, long cage|
|Shift Levers||Shimano Tiagra R4720, 10-speed|
|Cassette||Shimano Tiagra HG500, 12-28, 10-speed|
|Chain||Shimano Tiagra HG54, 10-speed|
|Crankset||Praxis Works Alba M30, 50/34 (compact), 30mm spindle|
|Front Wheel||Hub - Bontrager alloy, sealed bearing, Center Lock disc, 100x12mm thru-axle / rim - Bontrager Affinity Disc, tubeless-ready, 24-hole, 21mm width|
|Rear Wheel||Hub - Bontrager alloy, sealed bearing, Center Lock, Shimano 11-speed freehub, 142x12mm thru-axle / rim - Bontrager Affinity Disc, tubeless-ready, 24-hole, 21mm width|
|Front Tyre||Bontrager R1 Hard-Case Lite, wire bead, 60tpi, 700x32c, clincher|
|Rear Tyre||Bontrager R1 Hard-Case Lite, wire bead, 60tpi, 700x32c, clincher|
|Saddle||Bontrager Arvada Comp, steel rails|
|Seatpost||Bontrager carbon seat mast cap, integrated light mount, 20mm offset|
|Manufacturer Claimed Weight||Size 56 - 9.87kg / 21.75 lbs|
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 specified), 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.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. We do not install accessories to bikes, including mudguards.
Trek Domane SL 4 Disc Road Bike 2021 Sizing
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