BBB E-BikeGear Chainring

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4 arm E-bike chainring, BCD-104mm, for hub gear drivetrains. Compatible with Bosch(gen. 3 and gen. 4), Shimano Steps and other E-bike systems in combination with a BCD 104mm spider . Compatible with 9-12 speed chains Made from hardened steel for an extra long lifetime Chainring bolts not included Compatible with: Derailleur drivetrains Part materials: Carbon steel Crankset type: Single Gears: 9-speed, 10-speed, 11-speed, 12-speed Arm quantity: 4 arm crankset Bolt Circle Diameter: 104mm Sizes: 36T, 38T, 42T, 44T Show more