Ride faster than ever before with this cross country 2018 Trek Procaliber Hardtail Mountain Bike Frame Set, designed to set the bar for hardtail speed & smarts. This superb 2018 Procaliber Hardtail is the fast, ultra-light cross country ride that rules the singletrack; from the local race scene to the World Cup XC. Procalibers innovative Iso Speed decoupler delivers uncompromising XC performance, efficiency & brings an incredible feel to any ride. Its the fastest, smoothest & smartest hardtail on the trail. Create your very own masterpiece with this 2018 Procaliber Frameset at the heart. Alpha Platinum Aluminium frame Smooth Iso Speed decoupler: ride faster, stronger, longer Boost 148/110: stronger wheels, more tyre clearance, shorter stays