e*thirteen BOSCH e*spec Helix Core Direct Mount Chainring features a narrow-wide tooth profile, for reliable chain retention and extra-long wear life.
The BOSCH e*spec Helix Core Direct Mount Chainring functions with Bosch Gen 4 e-Bike system.
Designed with an adjustable 13.5-15.5mm offset via a spacer. This provides an adaptability to both 53 and 55mm chain lines for Bosch CX and SX motor systems.
The e*thirteen BOSCH e*spec Helix Core rings are cold formed from steel. Then heat treated to provide excellent durability and toughness, all at a price that’s easy on your wallet.
Details:
- Chainline: 53/55mm, 15.5mm/13.5mm Offset
- Colour: Black
- Compatibility: Bosch SX / Gen4 CX Direct Mount
- Material: 4040 Steel
- Weight: 34T – 189g
- Size 34T
Guaranteed to be free from defects in materials or workmanship for 5 years after original purchase.
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