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e*thirteen e*spec Aluminum Direct Mount Chainring 38t for Bosch CX Gen4, Black

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e*spec Direct Mount Chainrings use e*thirteen's M3 narrow-wide tooth profile, which reduces weight without sacrificing chain-retention. These lightweight and well-designed chainrings are adapted to work with Bosch Gen4 eBike motor configurations.
The M3 dual width tooth profile eliminates chain noise, and decreases overall system wear
53mm Boost chainline
7050 Aluminum