The Madone SL 5 Gen 8 is a lightweight aero road bike that brings elite racing technology to a more accessible price point. It delivers many of the aerodynamic benefits of the higher-end Madone SLR Gen 8, using a more economical OCLV 500 Carbon lay-up and a two-piece cockpit with hidden cable routing. A Shimano 105 groupset, alloy handlebars and alloy wheels keep the bike practical and dependable while delivering precise mechanical shifting.
Specifications
| 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, 12x100 mm chamfered thru axle |
| Shifting | Shimano 105 R7120, 12-speed, R7100 front/rear derailleur, 36T max cog |
| Crank | Shimano 105 R7100, 50/34 — 165 mm (XS–S), 170 mm (M–ML), 172.5 mm (L–XL) |
| Bottom bracket | Praxis, T47 threaded, internal bearing |
| Cassette / chain | Shimano 105 7101, 11-34, 12-speed — Shimano SLX M7100 chain |
| Hubs | Bontrager alloy, sealed bearing, CenterLock disc, Shimano 11-speed freehub, Bontrager Switch thru axles |
| Rims | Bontrager Paradigm 23, Tubeless Ready, 24-hole, 23 mm width, Presta valve |
| Tyres | Bontrager Aeolus Pro, Tubeless Ready, aramid bead, 120 tpi, 700x28 mm |
| Brakes | Shimano hydraulic disc, flat mount, CL700 CenterLock 160 mm rotors, max 180 mm front / 160 mm rear |
| Saddle | Bontrager Aeolus Elite, austenite rails, 145 mm width |
| Seatpost | Madone aero carbon, 0 mm offset, short length |
| Handlebar | Bontrager Comp alloy, 31.8 mm, 80 mm reach, 121 mm drop — control width 36–42 cm depending on size |
| Handlebar tape | Trek EcoTack |
| Stem | Trek RCS Pro, -7° — 80–110 mm depending on size |
| Bike weight (ML) | 8.64 kg / 19.05 lbs (with tubes) |
| Weight limit | 125 kg / 275 lbs total — bike + rider + cargo |
Specifications apply to all sizes unless stated otherwise. Specifications are subject to change without notice; due to supply chain availability, compatible components may occasionally be substituted.
Sizing and geometry
Sizing
| Size | XS | S | M | ML | L | XL |
|---|---|---|---|---|---|---|
| Rider height | 143–158 cm | 158–162 cm | 162–173 cm | 173–179 cm | 179–188 cm | 188–199 cm |
| Inseam | 67–74 cm | 74–76 cm | 76–81 cm | 81–84 cm | 84–88 cm | 88–100 cm |
All measurements in cm unless stated otherwise.
| Frame size | XS | S | M | ML | L | XL |
|---|---|---|---|---|---|---|
| Seat tube | 40.4 | 44.0 | 47.6 | 51.2 | 54.8 | 60.9 |
| Seat tube angle | 73.8° | 73.8° | 73.6° | 73.4° | 73.4° | 73.4° |
| Head tube length | 10.0 | 12.1 | 13.6 | 15.0 | 17.2 | 20.1 |
| Head angle | 71.6° | 72.2° | 72.9° | 73.5° | 73.8° | 73.9° |
| Effective top tube | 51.7 | 53.2 | 54.5 | 55.7 | 56.8 | 58.4 |
| Bottom bracket drop | 7.2 | 7.2 | 7.0 | 7.0 | 6.8 | 6.8 |
| Chainstay length | 41.0 | 41.0 | 41.0 | 41.0 | 41.1 | 41.2 |
| Fork offset | 5.0 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 |
| Trail | 6.1 | 6.2 | 5.8 | 5.9 | 5.7 | 5.7 |
| Wheelbase | 97.1 | 97.6 | 98.1 | 98.0 | 99.0 | 100.7 |
| Standover | 70.4 | 73.4 | 76.2 | 79.0 | 82.0 | 86.3 |
| Frame reach | 37.0 | 37.8 | 38.4 | 38.9 | 39.4 | 40.2 |
| Frame stack | 50.7 | 53.0 | 54.6 | 56.2 | 58.2 | 61.0 |
Trek bicycles and Bontrager accessories are reserved online and collected in person — this ensures the right size, a proper bike fit and expert guidance before you ride away.
