- Direct mount retainer ring designed specifically for our Bosch Motor E-Bikes
- Saves weight without need for a separate spider
- The narrow/wide chainring is designed to retain the chain without the need of a chain device
- Quieter drivetrain and less drag
- CNC machined 7075-T6 aluminium provides the perfect blend of lightweight and strength
- Compatible with 9, 10, 11 and 12 speed set-ups
- Hard anodised finish makes them ultra durable and increases longevity