Ochain

Ochain E, Internal Adjust, BOSCH DU38, B1

Ochain Ochain E is a tunable e-bike crank spider engineered to reduce the ride-quality compromises created by chain growth on full-suspension bikes. By adding adjustable angular “travel” at the chainring interface, it helps keep suspension movement more active under power and reduces unwanted pedal feedback when the rear end is cycling through its travel—especially on high-torque e-MTB setups using the BOSCH DU38 interface (B1).

Tuning and compatibility details that matter

1. Internally adjustable travel chip - Ships in a 9° factory setting, with included 6° and 12° chips to tailor response for different suspension designs, terrain, and pedaling feel
2. Chain growth mitigation - Reduces the negative effects chain growth can have on suspension performance, helping the bike track more freely through repeated hits while pedaling
3. Re-engineered durability - Updated design focuses on improved impact resistance, longevity, and contamination resistance for real-world e-MTB conditions
4. 104 BCD chainring requirement - Uses a 104 BCD chainring interface and fits 32–36T chainrings for common e-MTB gearing
5. Build note - Chainring and chainring bolts not included, allowing the rider to select the ring and hardware that match the drivetrain and riding goals