KMC Sprocket 21T Bosch Gen 2 11/128

Unleash Maximum Power and Precision in Every Ride.

Struggling with unreliable drivetrain performance? The KMC 21T Bosch Gen 2 Chainring delivers unmatched durability and seamless compatibility for your Bosch Gen 2 e-bike system. Crafted from premium Chromoly steel and finished in sleek black, it ensures optimal power transfer and smooth shifting even under the toughest conditions. Designed specifically for derailleur setups, this chainring is the ultimate upgrade for riders demanding precision and longevity.

Key Features

• 21-tooth design optimized for Bosch Gen 2 e-bike systems.
• Constructed from high-strength Chromoly steel for superior durability.
• Black finish for a sleek, modern look that resists wear.
• Compatible with derailleur setups ensuring smooth gear transitions.
• 11/128 bolt pattern for perfect fit and secure mounting.
• Engineered to maximize power efficiency and reduce drivetrain noise.

Technical Specifications

• Brand: KMC
• Type: Chainring / Tandwiel / Kettingblad
• Teeth: 21T
• Compatibility: Bosch Gen 2 e-bike system
• Material: Chromoly steel
• Color: Black
• Bolt Pattern: 11/128
• Suitable for: Derailleur systems
• Position: Front chainring

Frequently Asked Questions