E*THIRTEEN E*SPEC CHAINRING DIRECT MOUNT BOSCH CX GEN4 ALU Teeth:34T Choose TREK for uncompromising quality

Choose TREK for uncompromising quality and performance

With dimensions of 40

913 also required for Classic+ and model year 2011 / 2012

effortless release

completing a light upper styled to reflect the dimpled Aerofoil™ exterior of the Mono road cycling shoe

E*THIRTEEN E*SPEC CHAINRING DIRECT MOUNT BOSCH CX GEN4 ALU Teeth:34T Choose TREK for uncompromising qualitye*thirteens new direct mount e*spec chainrings use their new M3 narrow wide tooth profile, which reduces weight without sacrificing chain retention. In making their SL and UL chainrings lighter and more beautiful than their predecessors, they adapted a similar design to work with Bosch, Brose, and Shimano motor configurations. Details Weight: 34t 117g, 36T: 148g, 38T: 174g Light and durable construction, minimal aesthetics and updated M3 tooth profile