Chainring KMC Bosch Gen 4 40T chainline 52.0

Chainring KMC Bosch Gen 4 40T chainline 52.0

The reinforced KMC chainring for Bosch Gen 4 e-bike motors is designed for maximum durability and long service life. Advanced manufacturing and hardening processes make this chainring significantly more wear-resistant than standard models, making it ideal for high-torque e-bike drivetrain systems.

The chainring is developed for Bosch 4th generation motors and is fully compatible with Bosch Performance Line and Active Line drive systems. Precision machining ensures smooth power transfer and stable chain engagement even under demanding riding conditions and long-distance use.

KMC Bosch Gen 4 40T is designed for chains with dimensions of 11/128", while the 52.0 mm chainline helps maintain optimal drivetrain alignment. It is well suited for daily commuting as well as sporty e-MTB riding.

• Compatibility: Bosch Gen 4
• Tooth Count: 40T
• Chainline: 52.0 mm
• Compatible with: Performance Line / Active Line
• Chain Size: 11/128"
• Reinforced construction
• Material: hardened steel