e*thirteen Helix Race e*spec Chainring - Bosch SX / Gen4 CX Direct Mount 15mm Offset 32T 11/12 Speed Silver. Helix Race e*spec Chainrings merge cutting-edge design and performance. Designed for Bosch SX and Gen 4 CX equipped e-bikes this 1pc direct mount chainring is forged from 7075 AL for lightweight durability impressive stiffness and a standout technical aesthetic. Its custom metal dust cover enhances style and minimizes seal and lockring contamination.The new M4 narrow-wide profile delivers enhanced chain retention and cross-compatibility with Shimano Sram and TRP 11/12s drivetrains including SRAM T-Type.

15m Offset