kmc-logo

Bosch NW

EXACT CHAINRING

Colors

ED Black

Description

EXACT NARROW-WIDE CHAINRINGS

A chainring tooth profile with alternating narrow and wide teeth designed to match the inner and outer chain plate spacing. This precise engagement significantly improves chain retention, particularly on 1x e-Bike drivetrain systems with pronounced chain lines.

  • Perfectly matched to KMC chains
  • For Bosch Drive Units BDU38/34, BDU37 & BDU31
  • Narrow-wide tooth profile for precise interaction between chain and chainring
  • Maximum efficiency which saves battery
  • Dirrect Mount interface
  • Recommended chains: e-Series e1 / e8 / e9 / e10 / e11 / e12, DLC12

 

Compatibility: BDU38/34

- 34T, Chain line: 55mm

- 38T, Chain line: 47.5mm, 50mm, 52mm, 55mm

Compatibility: BDU37/31

- 34T, Chain line: 53mm

- 38T, Chain line: 45.5mm, 48mm, 50mm, 53mm

Features

Narrow-Wide Tooth Design Optimal tooth design

Remarkable chain retention

 Chain Mate

Efficient Power Transmission

 HTS

High-Tensile Steel
More

Benefits

Size

11/128” | Teeth Options: 34T, 38T | Color: Black

Suitable For

e-Bike

Related Products

News icon News

Accessories icon Accessories

Buy icon Buy

Knowledge icon Knowledge

Copyright © 2026 KMC. All Rights Reserved