Ochain

S Active E-Bike Spider - Bosch 55mm

The Ochain S Active E-Bike Spider - Bosch 55mm brings refined pedal dynamics and improved suspension performance to Bosch-equipped e-bikes. By introducing controlled rotation at the spider, it isolates the drivetrain from suspension movement, reducing pedal kickback and creating a smoother, more natural ride feel—similar to riding chainless. This active spider helps riders maintain traction and comfort on rough terrain, enhancing both control and efficiency.

Designed for easy tuning, the Ochain S allows external adjustment of the rotation angle, letting riders fine-tune responsiveness without disassembly. Built to work with standard 104 BCD chainrings, it’s compatible with 32–36 tooth setups and engineered to meet the demands of high-torque e-bike systems.

• Adjustable rotation system fine-tune pedal response externally for ideal suspension feel
• Spider rotation reduces pedal kickback and chain growth effects for smoother performance
• Improved suspension behavior enhances traction, comfort, and control on rough terrain
• 104 BCD compatibility fits 32–36t chainrings for easy setup with common drivetrain options
• Durable e-bike ready construction designed specifically for Bosch 55mm systems