Ochain

Ochain S, External Adjust, BOSCH DU38, B1

Ochain Ochain S is a performance-focused spider system built to reduce how much suspension-driven chain growth is transmitted back through the drivetrain—helping the bike stay calmer under power and reducing feedback at the pedals. Designed for BOSCH DU38 applications, it delivers a more composed feel through rough, active suspension travel while keeping setup straightforward with external adjustment.

Rotation control for smoother eMTB suspension feel

1. External adjustment - Allows the degrees of rotation to be changed from the outside for fast tuning without tearing down the drivetrain
2. Decouples chain growth at the spider - Reduces the chain-growth effects that reach the rider’s feet for a notably less “pedal-kickback” feel
3. Improves suspension behavior under load - Helps reduce negative chain-growth influence on suspension performance when the rear end is moving through travel
4. Re-engineered durability - Updated impact and contamination resistance for better real-world longevity on trail and enduro-style riding
5. 104 BCD chainring interface - Requires a 104 BCD chainring; compatible with 32–36T sizes for common eMTB gearing

• What’s included - Spider system only; chainring and chainring bolts not included