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The game has changed

In mountain biking's heyday, Procaliber was the envy of all other race bikes. Now it's back to rule the XC circuit once again, redefining the term “hardtail” and setting the bar for speed and smarts.

Procaliber's IsoSpeed decoupler delivers uncompromising cross country performance, efficiency, and an incredible ride feel. It's the fastest, smoothest, smartest hardtail on the trail.

IsoSpeed decoupler

Smooth means fast. Our innovative decoupler increases vertical compliance without sacrificing efficiency. You ride faster, longer, and stronger.

Doubly stiff: Boost148/110

Wider 148mm rear and 110mm front hub spacing on 29ers creates stronger, less flexy wheels and allows for wider tires, shorter chainstays, and more chainring options.

Light or super light

Choose between the SL (super light) or non-SL frame options. Both featherweight OCLV MTB frames, the SL option is the lightest possible frame for World Cup caliber performance.

Smart Wheel Size

One wheel size does not fit all. We put the right size wheel on every frame: 27.5” on 15.5” frames, 29er on 17.5” and up. Everyone wins.

Procaliber Family (6)

Customize your Trek

  • Choose your styling
  • Choose your components
  • Choose your fit

Don't settle for anyone else's bike. Create your very own with Project One, Trek's custom bike program. Customize, personalize or sensationalize, the choice is yours. Just select the model, fit, styling and components you desire, and we'll build your dream bike.

Learn more