The Trek 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.

The Domane SL Gen 4's rear IsoSpeed, integrated cables and aero Kammtail tube shapes come together for a fast, lightweight and road-smoothing ride
This bike is super versatile and equally suited to all-day adventures on the open road, club rides and racing
The Shimano's 105 Di2 wireless electronic drivetrain delivers precision shifts that won't leave a hole in your wallet
Road-smoothing IsoSpeed and clearance for up to 38 mm tyres absorbs fatiguing bumps in the road for a smoother, more comfortable ride
A convenient internal storage compartment gives you a versatile spot for stowing tools and gear, while top tube mounts let you cleanly bolt on a bag for day-long adventures

Sunset Cycles offers the 2025 Trek Domane SL 6 (Gen 4) endurance road bike in Lunar Silver finish with free delivery.

The 2025 Trek DOMANE SL (GEN 4) range: Domane SL 6 (Blue) | Domane SL 6 (Silver) | Domane SL 7 (Black)

Full Specification: Trek Domane SL 6 Gen 4 (Silver) 2025 Endurance Road Bike

Frame & Fork
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
Wheels & Tyres
Wheel front	Bontrager Paradigm Comp 25, Tubeless Ready, 25 mm rim width, 100x12 mm thru axle
Wheel rear	Bontrager Paradigm Comp 25, Tubeless Ready, 25mm rim width, Shimano 11/12-speed freehub, 142x12 thru axle
Tyre	Bontrager R3 Hard-Case Lite, Tubeless Ready, aramid bead, 120 tpi, 700x32 mm
Max tyre size	38mm without mudguards, 35mm with mudguards
Drivetrain
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 (Size: 44,47)	Shimano 105 R7100, 50/34, 165 mm length
Crank (Size: 50,52)	Shimano 105 R7100, 50/34, 170 mm length
Crank (Size: 54,56)	Shimano 105 R7100, 50/34, 172.5 mm length
Crank (Size: 58,60,62)	Shimano 105 R7100, 50/34, 175 mm length
Bottom bracket	Praxis, T47 threaded, internal bearing
Cassette	Shimano 105 7101, 11-34, 12-speed
Chain	Shimano SLX M7100, 12-speed
Components
Saddle (Size: 44,47,50,52)	Verse Short Comp, steel rails, 155 mm width
Saddle (Size: 54,56,58,60,62)	Verse Short Comp, steel rails, 145 mm width
Seatpost (Size: 44,47,50,52,54,56)	KVF aero carbon seat post, 20 mm offset, 280 mm length
Seatpost (Size: 58,60,62)	KVF aero carbon seat post, 20 mm offset, 320 mm length
Handlebar (Size: 44,47)	Bontrager Elite IsoZone VR-SF, alloy, 31.8 mm, internal Di2 routing, 75 mm reach, 128 mm drop, 36 cm width
Handlebar (Size: 50)	Bontrager Elite IsoZone VR-SF, alloy, 31.8 mm, internal Di2 routing, 75 mm reach, 128 mm drop, 38 cm width
Handlebar (Size: 52)	Bontrager Elite IsoZone VR-SF, alloy, 31.8 mm, internal Di2 routing, 75 mm reach, 128 mm drop, 40 cm width
Handlebar (Size: 54,56)	Bontrager Elite IsoZone VR-SF, alloy, 31.8 mm, internal Di2 routing, 75 mm reach, 128 mm drop, 42 cm width
Handlebar (Size: 58,60,62)	Bontrager Elite IsoZone VR-SF, alloy, 31.8 mm, internal Di2 routing, 75 mm reach, 128 mm drop, 44 cm width
Handlebar tape	Bontrager Supertack Perf tape
Stem (Size: 44)	Trek RCS Pro, -7-degree, 60 mm length
Stem (Size: 47)	Trek RCS Pro, -7-degree, 70 mm length
Stem (Size: 50)	Trek RCS Pro, -7-degree, 80 mm length
Stem (Size: 52,54)	Trek RCS Pro, -7-degree, 90 mm length
Stem (Size: 56,58)	Trek RCS Pro, -7-degree, 100 mm length
Stem (Size: 60,62)	Trek RCS Pro, -7-degree, 110 mm length
Brake rotor	Shimano RT70, CentreLock, 160 mm
Rotor size	Max brake rotor sizes: 160 mm front and rear
Weight
Weight
Weight limit	This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 125 kg (275 lb).

Size Guide: Trek Domane SL 6 Gen 4 (Silver) 2025 Endurance Road Bike

Frame Size	Rider Height* (metric)	Rider Height* (imperial)
44	150 - 153 cm	4'11" - 5'0"
47	152 - 158 cm	5'0" - 5'2"
50	158 - 163 cm	5'2" - 5'4"
52	163 - 168 cm	5'4" - 5'6"
54	168 - 174 cm	5'6" - 5'9"
56	174 - 180 cm	5'9" - 5'11"
58	180 - 185 cm	5'11" - 6'1"
60	185 - 190 cm	6'1" - 6'3"
62	190 - 195 cm	6'3" - 6'5"
*This is for guidance only. You may be taller or shorter, it doesn't mean our bikes will not fit you. The best way to determine the correct bike size for you is to try one. Please contact us if you are in any doubt about the correct bike size for you.