Trek Domane SL6 Road Bike 2025
If your rides often begin on the road but might lead onto gravel or trails, the Trek Domane SL6 Road Bike 2025 is an ideal choice. It combines versatility, comfort, and speed, with an emphasis on aesthetics and reliability. Riders will benefit from the advanced Shimano 105 Di2 electronic drivetrain and responsive hydraulic disc brakes, while the carbon frame and rear IsoSpeed technology ensure a smooth, enjoyable ride.
The Domane SL Gen 4 features a lightweight 500 Series OCLV Carbon frame, road-smoothing rear IsoSpeed, a Shimano 105 Di2 2x12-speed electronic drivetrain, and powerful flat-mount disc brakes. It also includes wide Bontrager Paradigm Comp 25 tubeless-ready wheels, integrated storage, and sleek internal cable routing. Top tube mounts provide secure bag attachment without bulky straps, making it ideal for extended rides. With clearance for up to 38mm tyres, the bike is ready to glide over tarmac and light gravel, offering a fast, comfortable, and adventure-ready experience.
Blending speed, comfort, and versatility, the Domane SL Gen 4 incorporates rear IsoSpeed, integrated cables, and aero Kammtail tube shapes for a lightweight and smooth performance. The Shimano 105 Di2 drivetrain provides precise shifting at excellent value, making this bike perfect for all-day road adventures, club rides, or racing. Its internal storage compartment and top tube mounts add practicality, making it well-suited to long days out on the road.
Technical Specification
| Frame | 500 Series OCLV Carbon, IsoSpeed, internal storage, tapered head tube, internal cable routing, 3S chain keeper, mudguard mounts, flat mount disc, 142x12 mm thru axle |
| Fork | Domane SL carbon, tapered carbon steerer, internal brake routing, mudguard 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 105 R7170, 12-speed |
| Front derailleur | Shimano 105 R7150 Di2, braze-on, down swing |
| Rear derailleur | Shimano 105 R7150 Di2, 36T max cog |
| Crank | Shimano 105 R7100, 50/34 |
| Bottom bracket | Praxis, T47 threaded, internal bearing |
| Cassette | Shimano 105 7101, 11-34, 12-speed |
| Chain | Shimano SLX M7100, 12-speed |
| Max. chainring size | 1x |
| Wheel front | Bontrager Paradigm Comp 25, Tubeless Ready, 25 mm rim width, 100x12 mm thru axle |
| Wheel rear | Bontrager Paradigm Comp 25, Tubeless Ready, 25 mm rim width, Shimano 11/12-speed freehub, 142x12 mm thru axle |
| Tyre | Bontrager R3 Hard-Case Lite, Tubeless Ready, aramid bead, 120 tpi, 700x32 mm |
| Saddle | Verse Short Comp, steel rails |
| Seatpost | KVF aero carbon seat post, 20 mm offset |
| Handlebar | Bontrager Elite IsoZone VR-SF, alloy, 31.8 mm, internal Di2 routing |
| Handlebar tape | Bontrager Supertack Perf tape |
| Stem | Trek RCS Pro, -7-degree |
| Brake rotor | Shimano RT70, CentreLock, 160 mm |
| Rotor size | Max brake rotor sizes |
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.
Trek Domane SL 6 Gen 4 Road Bike 2025 Sizing
Unable to display Reviews due to Privacy Settings.
Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".
Unable to display Q&A due to Privacy Settings.
Adjust your Cookie Preferences to Opt-in "YES" to "Functional Cookies".
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.