Compared to the alloy counterpart, Trek claims the carbon frames are almost a pound lighter, shaving 400g. Stache framesets will also be offered but only of the carbon variety. The geometry of the aluminum Stache will remain unchanged. The Stache 9.6 carbon (above) runs the RockShox Yari, both forks run Trek’s G2 geometry with a 51mm offset. Both aluminum and carbon bikes now offer 120mm front travel with the top end Stache 9.8 (top) receiving the new RockShox Pike 29+ fork. The carbon frames also grow at the top tube with a 15mm longer reach. The only difference between the carbon and aluminum bikes out back is a 5mm lower BB on the new carbon frame for more aggressive handling.
Part of the tire clearance equation is Boost 148 dropouts matched with the PF92 bottom bracket. Both bikes feature the Stranglehold adjustable dropouts which allow for multiple tire sizes or for the use of single speed drivetrains (even belt drive thanks to the elevated stay). The elevated chain stay allows for a 405-420mm chain stay length while maintaining proper clearance for the chainrings and wide 29 x 3.0″ tires. In terms of the frame details, the Stache 9.6 and 9.8 carbon frames are very similar to their aluminum counterparts. Built with the same features, the carbon bikes do offer improved geometry which will make them even more capable as all around rippers…
Now, Trek is expanding on that initial Stache with the addition of two carbon frames. In the mind of Trek’s designers and engineers, that was the key to making the bigger tires work in a trail capable hardtail. Built with a elevated chain stay and a PF92 bottom bracket, the design allowed for ridiculously short chain stays that would still swallow a 29+ tire. Even though Salsa beat Trek to the punch by showing us the carbon 29+ Woodsmoke at Saddle Drive, Trek has been catering to the 29+ crowd for some time with their aluminum Stache. Showing their commitment to huge tires and elevated chain stays, the Trek Stache is getting an upgrade.
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