e-THIRTEEN CHAINRING E-SPEC – Our new direct mount e*spec chainrings use our new M3 narrow-wide tooth profile, which reduces weight without sacrificing chain-retention. In making our SL and UL chainrings lighter and more beautiful than their predecessors, we adapted a similar design to work with Bosch, Brose, Fazua and Shimano motor configurations.
11 and 12-Speed Drivetrain Systems
Updated M3 narrow-wide tooth profile eliminates chain noise, and decreases overall system wear.
52mm or 53mm (Boost chainline)
M3 narrow-wide tooth profile
Bosch™, Brose™, Shimano™ & Fazua™
Lightweight and durable design, minimal aesthetics, and updated M3 tooth profile.
32t (Shimano only), 34t, 36t, 38t