The e*thirteen e*spec Plus Crank Arm Set is designed to work with Bosch Gen 4 eBike motors. These alloy crank arms offer a slim Q-factor and smaller overall profile, while keeping e*thirteen's proven crank technology at the forefront.
An 8mm self extractor bolt is built into both arms for easy removal
141/148 Boost Hubs, 150/157 Hubs
Direct Mount Bosch
Crank Length (mm)
Number of Chainrings
No Rings Included
422, 433, Yes
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