Madone SL 6 Gen 8 - 2025
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Overview
Features
Specs
Sizing
Geometry
It's just too perfect - Madone SL 6 Gen 8 - 2025
You’re seeking a lightweight road race bike that delivers top performance without the high-end price tag. Ideal for racing, club rides, or solo climbs, you want a bike that excels in both climbing efficiency and aerodynamics. You value the dependable performance of Shimano's 105 group set, but also want the quick, precise shifting of Di2 electronic technology.
Technology you get
An ultra-light OCLV 500 Carbon frame with aerodynamic tubing and IsoFlow comfort technology. It features a 2x12 Shimano 105 Di2 electronic drivetrain for precise shifting, benefiting from advanced tech. The bike is finished with Bontrager Aeolus Elite 35 carbon wheels, set up tubeless for added performance.
In general
The Madone SL 6 Gen 8 combines race-ready aerodynamics with lightweight performance at a more accessible price. Featuring a 500-Series OCLV Carbon frame and a reliable Di2 drivetrain, it provides superbike capabilities without the top-end cost. With aero tube shaping and IsoFlow comfort technology, it delivers the same advanced frame tech as its SLR counterpart, keeping you at the forefront of the race.
Why would you like it ?
The Madone SL 6 Gen 8 combines race-ready aerodynamics with lightweight performance at a more accessible price. Featuring a 500-Series OCLV Carbon frame and a reliable Di2 drivetrain, it provides superbike capabilities without the top-end cost. With aero tube shaping and IsoFlow comfort technology, it delivers the same advanced frame tech as its SLR counterpart, keeping you at the forefront of the race.
the walktrough
The lightest Madone disc ever
The Gen 8's innovative light and fast aero tube design, combined with the exceptional 900 Series OCLV Carbon, makes it the lightest Madone Disc model to date, as light as the Émonda Disc.
Redefines what fast looks like
Revolutionizing speed, the new Full System Foil aero tube shapes enhance airflow across the entire bike while preserving the lightweight design that climbers love. Every aspect of the bike's rider system has been meticulously engineered and thoroughly tested to excel in all conditions.
80% more vertically compliant IsoFlow
We’ve enhanced our race-oriented comfort technology to offer 80% more vertical compliance, making it lighter and providing nearly double the comfort. This means you can ride longer and stronger with less fatigue.
Carbon care wheels loyalty programme
Our Bontrager carbon wheels loyalty programme ensures that if your wheels are damaged within two years of buying them, you can replace or repair them for free.
500 Series OCLV
The 500 Series OCLV provides a remarkable balance of light weight, power, and rigidity, making it suitable for Trek's innovative frame technologies.
Road race geometry and fit
The Madone Gen 8’s advanced positioning maximizes your speed by keeping you in an aerodynamic stance, and offers a range of fit options to accommodate various rider needs.
Invisible cable routing
The most aerodynamic bike's brake and shift cables are run through the frame for the smoothest, most aerodynamic performance possible.
T47 Bottom Bracket
A threaded T47 bottom bracket is a key feature of this bike, offering reliable performance and straightforward maintenance, plus added stiffness for superior power transfer and pedaling efficiency.
Blender stem
With the support of Bontrager's blender stem technology, you can attach your equipment perfectly and easily to the handlebar.
Warranted for life
When you choose Bontrager wheels, you are choosing a lifetime of trust and investment that will increase the handling and performance of your bicycle. All Bontrager wheels are covered by a lifetime warranty.
*Please note – spec applies to all sizes unless listed separately
- Frame
- 500 Series OCLV Carbon, Full System Foil tube shaping, IsoFlow seat tube, RCS Headset System, electronic or mechanical routing, removable aero chain keeper, T47 BB, flat mount disc, UDH, 142x12 mm thru axle
- Fork
- Madone Gen 8 full carbon, tapered carbon steerer, internal brake routing, flat mount disc, 12x100mm chamfered thru axle
- Weight
- ML - 8.16 kg / 17.99 lbs (with TLR sealant, no tubes)
- Weight limit
- This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 125 kg (275 lb).
- Battery
- Shimano BT-DN300
- Charger
- Charging cable included
- Shifter
- Shimano 105 R7170 Di2, 12-speed
- Front derailleur
- Shimano 105 R7150 Di2, braze-on, down swing
- Rear derailleur
- Shimano 105 R7150 Di2, 36T max cog
- *Crank
- Size: XS, S
Shimano 105 R7100, 50/34, 165 mm lengthSize: M
Shimano 105 R7100, 50/34, 170 mm lengthSize: ML, L
Shimano 105 R7100, 50/34, 172.5 mm lengthSize: XL
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
- Max. chainring size
- 1x: 54T, 2x: 56/43
- Wheel front
- Bontrager Aeolus Elite 35, OCLV Carbon, Tubeless Ready, 35 mm rim depth, 100x12 mm thru axle
- Wheel rear
- Bontrager Aeolus Elite 35, OCLV Carbon, Tubeless Ready, 35 mm rim depth, Shimano 11/12-speed freehub, 142x12 mm thru axle
- Skewer front
- Bontrager Switch chamfered thru axle
- Skewer rear
- Bontrager Switch chamfered thru axle, removable lever
- Tyre
- Bontrager R3 Hard-Case Lite, Tubeless Ready, aramid bead, 170 tpi, 700x28 mm
- Tyre part
- Bontrager TLR sealant, 180 ml/6 oz
- Rim strip
- Bontrager TLR
- Max tyre size
- 32 mm (as measured, see manual for details)
- *Saddle
- Size: XS, S
Bontrager Aeolus Comp, steel rails, 155 mm widthSize: M, ML, L, XL
Bontrager Aeolus Comp, steel rails, 145 mm width - *Seatpost
- Size: XS, S, M, XL
Madone aero carbon seat post, 0 mm offset, short lengthSize: ML, L
Madone aero carbon seat post, 0 mm offset, long length - *Handlebar
- Size: XS
Bontrager Comp, alloy, 31.8 mm, 80 mm reach, 121 mm drop, 36 cm control width, 40 cm drop widthSize: S, M
Bontrager Comp, alloy, 31.8 mm, 80 mm reach, 121 mm drop, 38 cm control width, 42 cm drop widthSize: ML, L
Bontrager Comp, alloy, 31.8 mm, 80 mm reach, 121 mm drop, 40 cm control width, 44 cm drop widthSize: XL
Bontrager Comp, alloy, 31.8 mm, 80 mm reach, 121 mm drop, 42 cm control width, 46 cm drop width - *Stem
- Size: XS
Trek RCS Pro, -7-degree, 80 mm lengthSize: S, M
Trek RCS Pro, -7-degree, 90 mm lengthSize: ML, L
Trek RCS Pro, -7-degree, 100 mm lengthSize: XL
Trek RCS Pro, -7-degree, 110 mm length - Brake rotor
- Shimano RT70, CentreLock, 160 mm
- Rotor size
- Max brake rotor sizes: 180 mm front, 160 mm rear
Size
XS
S
M
ML
L
XL
Rider Height
143 - 158 cm
4'8" - 5'2"
158 - 162 cm
5'2" - 5'4"
162 - 173 cm
5'4" - 5'8"
173 - 179 cm
5'8" - 5'10"
179 - 188 cm
5'10" - 6'2"
188 - 213 cm
6'2" - 7'0"
Inseam
67 - 74 cm
26" - 29"
74 - 76 cm
29" - 30"
76 - 81 cm
30" - 32"
81 - 84 cm
32" - 33"
84 - 88 cm
33" - 35"
88 - 100 cm
35" - 39"
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