Trek Madone SL 6 Gen 8 Bike (2025)

Trek Madone SL 6 Gen 8 Road Bike in white. Trek Reference: 5319982

The Madone SL 6 Gen 8 is a lightweight and aerodynamic road bike that offers elite racing technology at a more affordable price. It provides similar aerodynamic advantages to the higher-priced Madone SLR Gen 8 but with a more economical OCLV 500 carbon layup and a two-piece cockpit with hidden cables. It’s designed for racing, with a geometry that keeps you comfortable on climbs and ready to attack. The Shimano 105 Di2 electronic group is budget-friendly while still offering incredibly fast electronic shifting. In addition, the extremely lightweight carbon wheels allow you to achieve maximum performance.

Ideal for you if...

You want a featherweight road bike without the price tag of a high-end racing bike. You enjoy racing, group rides, or solo miles through winding gorges, and you don’t want to sacrifice climbing efficiency or aerodynamics. You love the performance offered by the Shimano 105 group but also seek the added advantage of the lightning-fast Di2 electronic shifting.

Technology it incorporates

An extremely lightweight OCLV 500 Series carbon frame with aerodynamic tubes and IsoFlow comfort technology. A Shimano 105 Di2 2x12 electronic group that allows for precise shifting thanks to trickle-down technology. Additionally, it is equipped with Bontrager Aeolus Elite 35 carbon tubeless wheels.

The final word

The Madone SL 6 Gen 8 offers race-worthy aerodynamics and a weight that allows you to crush climbs. It’s a true superbike in a more economical package thanks to the OCLV 500 Series carbon layup and the powerful Di2 group. It features the same frame technology as its SLR counterpart, including the aerodynamic tube design and IsoFlow comfort technology, so you can stay at the front of the pack.

Specifications

Frame set

• Frame: OCLV 500 Series Carbon, Full System Foil tube shapes, IsoFlow seat tube, RCS headset system, internal electronic or mechanical cable routing, removable aerodynamic chain guide, T47 bottom bracket, flat mount disc, UDH, 142x12 mm thru-axle
• Fork: Madone Gen 8 full carbon, tapered carbon steerer, internal brake routing, flat mount disc, 12x100 mm chamfered thru-axle

Wheels

• Front wheel: Bontrager Aeolus Elite 35, OCLV Carbon, Tubeless Ready, 35 mm rim depth, 100x12 mm thru-axle
• Rear wheel: Bontrager Aeolus Elite 35, OCLV Carbon, Tubeless Ready, 35 mm rim depth, Shimano 11/12 speed hub, 142x12 mm thru-axle
• Front skewer: Bontrager Switch thru-axle, removable lever
• Rear hub: Bontrager Affinity Comp, Shimano 11/12 speed freehub, 142x12 mm thru-axle
• Rear skewer: Bontrager Switch thru-axle, removable lever
• Rim: Bontrager Aeolus Elite 35, OCLV Carbon, Tubeless Ready, 35 mm rim depth, 100x12 mm thru-axle
• Tire: Bontrager R3 Hard-Case Lite, Tubeless Ready, aramid bead, 170 tpi, 700x28 mm
• Tire part: Bontrager TLR sealant, 6 oz
• Rim strip: Bontrager TLR
• Max tire size: 32 mm (per measurements, see manual for detailed information)

Electrical system

• Charger: Charging cable included

Drivetrain

• Shift lever: Shimano 105 R7170, 12-speed
• Front derailleur: Shimano 105 R7150 Di2, braze-on, down-swing
• Rear derailleur: Shimano 105 R7150 Di2, max cog 36T
• Crankset: Shimano 105 R7100, 50/34, 170 mm length (M)
• 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: 54T, 2x: 56/43

Components

• Saddle: Bontrager Aeolus Comp, steel rails, 145 mm width (M, L)
• Seatpost: Madone aerodynamic integrated carbon seat mast, 0 mm offset, long (M, L)
• Handlebar: Bontrager Comp, aluminum, 31.8 mm, 80 mm reach, 121 mm drop, 40 cm brake lever width, 44 cm bar end width (M, L)
• Stem: Trek RCS Pro, -7 degrees, 100 mm length (M, L)
• Brake rotor: Shimano RT70, centerlock, 160 mm
• Rotor size: Max brake rotor sizes: 180 mm front, 160 mm rear

Weight

• Weight: ML - 8.16 kg / 17.99 lbs (with TLR sealant, no tubes)
• Weight limit: This bike has a maximum weight limit (combined weight of bike, rider, and cargo) of 125 kg.