e-THIRTEEN CHAINRING E-SPEC

e-THIRTEEN CHAINRING E-SPEC

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.

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