E*thirteen e*spec Aluminum C-ring, Bosch CX Gen 4, 34t, Black

The Ethirteen espec Aluminum C-ring is a premium direct-mount chainring designed specifically for Bosch CX Gen 4 e-bike systems. Built for durability and optimal drivetrain performance, this 34T chainring features E*thirteen’s updated M3 narrow-wide tooth profile, engineered to reduce chain noise, minimize wear, and provide secure chain retention—even under high-torque e-bike loads.

Precision-machined from lightweight aluminum and finished in black, the e*spec C-ring is compatible with 11- and 12-speed drivetrains, including both Shimano and SRAM 12-speed systems (T-Type compatible). It’s an excellent upgrade or replacement option for riders looking to improve drivetrain efficiency and reliability.

Features:

• 34T direct-mount chainring for Bosch CX Gen 4

• Updated M3 narrow-wide tooth profile for improved chain retention

• Reduces chain noise and overall drivetrain wear

• Compatible with 11- and 12-speed drivetrains

• Works with Shimano and SRAM 12-speed systems, including T-Type

• Lightweight and durable aluminum construction

• Sleek black finish