TREK DOMANE SL 6 GEN 4 ROAD BIKE 2025 MARIANAS BLUE

The Domane SL 6 is an endurance road bike that's light, aerodynamic and built to take on long, rough miles in the saddle.

With the huge advantage of an electronic Shimano 105 Di2 drivetrain and clearance for 38 mm tyres, the Domane SL 6 is ready to soar over cobbles and tarmac alike. A fully integrated cockpit keeps your set-up looking as sleek as it feels and an easy-access storage compartment stows ride essentials. Pair that with road-smoothing rear IsoSpeed, easy-access internal storage, tubeless-ready wheels and you'll be riding for longer – and having more fun – than you ever thought possible.

Key Features Trek Domane SL 6 Gen 4 Road Bike 2025

• Carbon Fibre Frame: Ultra lightweight & durable to give you a competitive advantage
• Shimano 105 Di2 Wireless Drivetrain: Delivers smoother gear progression, greater precision & predictability.
• Hydraulic Disc Brakes: Consistent braking performance for better control and confidence in race conditions.

Specification

• Frame: 500 Series OCLV Carbon, IsoSpeed, internal storage, tapered head tube, internal cable routing, 3S chain keeper, mudguard mounts, flat mount disc, 142x12mm thru axle
• Fork: Domane SL carbon, tapered carbon steerer, internal brake routing, mudguard mounts, flat-mount
• Gear Shifters: Shimano 105 R7170, 12-speed
• Chainset: Shimano 105 R7100, 50/34, 165-175 mm length
• Chainrings: 50/34T
• Rear Cassette: Shimano 105 7100, 11-34, 12-speed
• Chain: Shimano SLX M7100, 12-speed
• Front Derailleur: Shimano 105 Di2
• Rear Derailleur: Shimano 105 Di2
• Bottom Bracket: Praxis, T47 threaded, internal bearing
• Pedals: Not Included
• Rims: Bontrager Paradigm Comp 25, Tubeless Ready, 25mm rim width, 100x12mm thru axle
• Front Hub: Bontrager Paradigm Comp 25, Tubeless Ready, 25mm rim width, 100x12mm thru axle
• Rear Hub: Bontrager Paradigm Comp 25, Tubeless Ready, 25mm rim width, Shimano 11/12-speed freehub, 142x12 thru axle
• Tyres: Bontrager R3 Hard-Case Lite, Tubeless Ready, aramid bead, 120 tpi, 700x32c
• Brakes: Shimano 105 hydraulic disc, Rotor: SM-RT70, Centrelock, 160 mm
• Handlebars: Bontrager Elite IsoZone VR-SF, alloy, 31.8 mm, internal Di2 routing, 75 mm reach, 128 mm drop, 36-44 cm width
• Handlebar Tape: Bontrager Supertack Perf tape
• Headset: Integrated
• Stem: Bontrager RCS Pro, 7-degree, 60-110mm length
• Saddle: Bontrager P3 Comp, short nose, 145-155mm width
• Seatpost: Domane carbon seat post, KVF2 shaping, 20 mm offset, 280-320mm length
• Accessories: Bontrager Bits frame storage bag
• Weight: 56 - 8.90 kg / 19.63 lbs

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.

At All Terrain Cycles, we want you to ride with confidence every time. To ensure your bike or e-bike stays in peak condition, here are some essential safety and maintenance tips.

Bicycle Safety 

Always wear a helmet – Safeguard against head injuries by using a properly fitted, safety-certified helmet.

Perform pre-ride checks – Before each ride, verify that brakes, tyres, and gears are in good working order.

Stay visible – Utilise lights and reflective gear when cycling in low-light conditions.

Follow road rules – Ride responsibly and remain aware of your surroundings.

Aftercare for Your New Bike Initial Check-Up (First 50-100 miles)

Gear Adjustment – New cables may stretch slightly; have a qualified mechanic check and adjust them.

Brake & Wheel Check – Inspect brakes for wear and ensure wheels are aligned properly.

Lubrication – Apply chain oil and check bolt tightness to maintain smooth performance.

Tyre Pressure – Regularly monitor to prevent flats and enhance efficiency.

Pedals - Ensure pedals are still tight and correctly fitted.

Routine Maintenance (Every Few Weeks)

Chain Care – Clean and lubricate your chain to minimise wear and prolong its life.

Brake Safety – Check brake pads and responsiveness before each ride.

Tyre Inspection – Look for punctures and ensure correct air pressure.

Handlebar & Stem Alignment – Confirm they are tight and secure to prevent instability.

Frame Safety Check – Look for any signs of damage or cracks.

Pedals - Ensure pedals are still tight and correctly fitted.

Professional Check-Ups

Have your bike serviced at least once a year, or more frequently if you ride often.

Aftercare for Your New Electric Bicycle (e-Bike) Initial Check-Up (First 50-100 miles)

Battery Care – Fully charge your battery (if required) before the first ride and store it in a dry, moderate-temperature environment.

Avoid Overcharging – Unplug the charger once fully charged to extend battery life.

Pedals - Ensure pedals are still tight and correctly fitted.

Routine e-Bike Maintenance (Every Few Weeks)

Motor Inspection – Listen for unusual noises and ensure smooth operation.

Battery & Connection Checks – Inspect cables and connectors for dirt, moisture, or damage.

Pedals - Ensure pedals are still tight and correctly fitted.

Seasonal e-Bike Maintenance

Check Electrical Components – Ensure wires and connections are clean and secure.

Professional Servicing – Have your e-bike inspected at least once a year or every 500-1000 miles for optimal performance.

By following these aftercare guidelines, you’ll help ensure that your bicycle runs smoothly, lasts longer, and remains a joy to ride. Stay safe and enjoy the ride!

Read our full advice

If you have any problems or concerns: Contact All Terrain Customer Services on 01274 588488 or email sales@allterraincycles.co.uk