Procaliber SL is for the fastest XC riders. It's built with Super Light OCLV Mountain Carbon and delivers the unique trail-smoothing advantage of IsoSpeed, which takes the edge off fatiguing bumps in the trail so you can stay stronger for longer.

You have a dream XC build in mind, and you want to start with an ultra-light carbon hardtail frame so you can fly up climbs and win every sprint off the line.

A Super Light OCLV Mountain Carbon frame with Control Freak internal cable routing and trail-smoothing IsoSpeed. The Procaliber SL frame set includes a headset, and is designed for a PF92 bottom bracket and Smart Wheel Size with up to 2.2" wide tyres.

Smoother. Lighter. Faster. Procaliber SL was built to win the XC game. The ultra-lightweight SL OCLV Mountain Carbon frame with IsoSpeed delivers serious performance for serious riders.
- This SL OCLV Mountain Carbon frame set is the ideal start to an obscenely lightweight cross country build
- The IsoSpeed decoupler makes it ride smoother than any other hardtail, so your body doesn't get beaten up by trail chatter
- Control Freak Cable Management allows you to run any combination of cables exactly the way you want, while still giving you sleek looks and protecting your cables against unnecessary wear
- Boost148 spacing for 29" wheels on all frame sizes except S, which has a 142x12 mm rear axle and 27" wheels

OCLV Mountain Carbon
Trek's mountain-specific carbon fibre is tougher carbon, with unique materials and lay-up procedures, Trek's advanced engineering, and a higher standard of testing.

IsoSpeed smooth
IsoSpeed takes the edge off body-beating small bumps and trail chatter so you can stay stronger longer, without giving up any pedalling efficiency.