Bosch Lockring BDU4XX, BDU37YY, BDU31YY

Lockring for mounting the spider with mounted chainring for Bosch eBike System 2 and The Smart System.

Also required: Bosch O-ring 1270016119

(view second image, not included in this product)

Compatible with:
BDU4XX
BDU37YY
BDU31YY manufacturer item code: EB112000JH