Bosch Gen4

eBike Sprockets

Colors

ED Black

Bosch Gen4

eBike Sprockets

Description

【Maximum durability | High efficiency】

【Direct Mount | Easy upgrade】

KMC created the "Chain Mate" where the chainring roller seats between teeth are matched to chain rollers for exceptional component engagement. Made of High Tensile Steel, the Chainring structure enhances retention with an optimized tooth design to hold the rollers in place, significantly preventing chain drop while also reducing friction associated with traditional narrow/wide designs. In addition, the tooth is vertically asymmetrical to avoid interference while at extreme chain angles to the cassette.

Compatibility: BDU38, BDU37, BDU31

	BDU38	BDU37&BDU31
- 38T, Chain line:	49.5mm, 52mm, 54mm	47.5mm, 50mm, 52mm
- 40T, Chain line:	54mm	52mm
- 42T, Chain line:	49.5mm, 52mm, 54mm	47.5mm, 50mm, 52mm