Trek Procaliber Carbon Gen3 2025

Procaliber Carbon Gen 3 is rolling to the start line with a new frame that maintains Procaliber’s unique advantage of fatigue-fighting compliance and loses weight by replacing IsoSpeed with IsoBow – the culmination of months of test lab and real-world research to find the right blend of low weight, lateral stiffness, and vertical compliance.

What’s new?

1. IsoBow
2. More travel (120mm)
3. Updated geometry
4. More TYRE CLEARANCE
5. Floating Brake Mount

The smoothest speed on singletrack

The new Procaliber Carbon frame is about 200g lighter than the previous generation, thanks to IsoBow. This carefully engineered frame flex makes new Procaliber simpler and lighter without giving up the benefits of seated compliance. In blind back-to-back testing on the trail, riders couldn’t tell a difference in comfort from the previous generation, and lab testing backed it up. IsoBow gives XC riders the unmatched fatigue-fighting comfort Procaliber is known for, but with a lighter, simpler frame.

Gen 3 Procaliber Carbon comes with a 120mm fork that makes it easier to hold your line through the rough stuff, which saves both mental and physical energy.

Longer reach and a slacker head tube angle make new Procaliber feel more trustworthy on descents. Calmer handling increases your confidence and makes you faster.

Floating between the stays, the brake mount keeps braking forces from hindering seatstay flex. In other words, not having a brake mount on the seatstay allows it to flex more freely, so you get more control.

New Procaliber uses the fastest-rolling 29˝ wheels on all sizes, and now it can run up to 2.4˝ tires for extra grip and control on rougher trails.

Whether you’re an XC racer, hardtail purist, or flat-bar gravel rider, you’ll love the low weight, high value, and energy-saving compliance of the new Procaliber Carbon.