Initial Thoughts and experiences: Trek 2014 X-Caliber 6 29er | Mountain Bike Reviews Forum
Procaliber 6 - Trek Bikes
Trek Pro Caliber 6 : r/Hardtailgang
Procaliber 6 - Trek Bikes (INE)
Worth it? This is a Trek x-caliber 6 from 2016. Seller is asking $675. Trek seems to have discontinued the 6 and that model now starts at 7. : r/whichbike