E-MTB Chainrings

Heavier bikes hit rocks harder. Motor torque demands more from your drivetrain. Our E-MTB chainrings are engineered for this reality. M4 narrow-wide profile for chain retention and wear life. Direct mount for Bosch®, Shimano®, TQ®, Fazua®, Avinox®, Specialized®. Turbocharger adds bashguard protection where ISCG mounts aren't an option.
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7 products

More about e*thirteen E-MTB Chainrings

Motor-assisted torque and added bike weight put unique demands on drivetrain components. We designed every e*spec chainring from the ground up to handle it, with reinforced tooth profiles and integrated dust covers that keep your system running clean.

Helix Race e*spec is forged and CNC-machined from 7075 aluminum for lightweight strength and a refined aesthetic. Available for Bosch® CX Gen4/Gen5, Bosch® SX, Shimano® EP8, TQ® HPR50, Fazua® Ride 60, Avinox®, and Specialized® SL 1.1, 2.1, and 2.2 motors. Multiple offset options let you dial in the perfect chainline.

Turbocharger Race solves a problem most E-MTB riders know too well: compact motor systems leave your chainring exposed with no ISCG mounts for a traditional bashguard. The Turbocharger integrates a 104 BCD spider, composite bashguard, and Helix chainring into one system. Available for TQ® HPR50, Fazua® Ride 60, Bosch® SX, and Avinox®. Add the upper slider for complete chain retention.

Helix Core e*spec delivers cold-formed steel durability at a price that makes regular replacement painless.

Every e*spec ring is cross-compatible with Shimano®, SRAM®, and TRP® 11/12-speed drivetrains including T-Type™.