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Bosch 	 Lock ring (BDU4XX, BDU37YY, BDU31YY, BDU34YY, BDU38YY)

Key features

  • Genuine Bosch replacement lock ring to secure the chainring spider on BDU4XX, BDU37YY, BDU31YY, BDU34YY and BDU38YY mid-drive motors
  • Compatible with both Bosch eBike System 2 and Smart System, covering a wide range of Bosch-powered bikes
  • Manufacturer reference EB112000JH (EAN 4054289010799) ensures you order the exact correct part first time
  • Pair with Bosch O-ring ref. 1270016119 (sold separately) for a complete and reliable replacement

Bosch Lock ring (BDU4XX, BDU37YY, BDU31YY, BDU34YY, BDU38YY)

Genuine Bosch lock ring to keep your chainring securely fixed.

11,99 €
Quantity:
1

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Liège Brussels

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Description

The Bosch lock ring (part no. EB112000JH) is the original fixing ring that secures the chainring or spider to the mid-drive motor unit. Small in size, but essential: without it properly torqued in place, the crankset cannot be safely retained during riding.

It is compatible with a broad range of Bosch mid-drive motors — BDU4XX, BDU37YY, BDU31YY, BDU34YY and BDU38YY — and works across both the Bosch eBike System 2 and the Bosch Smart System. This makes it a versatile replacement part that covers a wide variety of e-bikes currently on the road.

The package contains one lock ring. Please note that a correct installation also requires a Bosch O-ring (ref. 1270016119), which is sold separately. We recommend sourcing both parts before starting the job to avoid any delays mid-repair.

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