SRAM Ochain E Spider B1

SRAM Ochain E Spider B1 is an e-MTB spider system built to reduce pedal feedback, improve control, and support a quieter ride on rough terrain. Its chainring can rotate backwards within the spider, which helps separate the rider from pedal kickback forces. This reduces chain turbulence and drivetrain noise, so the bike feels more stable when braking, cornering, and riding over harsh ground.

Key Features and Benefits:

• Pedal feedback decoupling spider system: The spider allows the chainring to rotate backwards under load, which reduces the forces that travel back through the pedals. This helps limit pedal kickback, so the rider can stay more composed on rough and technical terrain.
• Designed for e-MTB use: The Ochain E is made for the higher loads and demands of electric mountain bikes. This gives e-MTB riders a system built for aggressive enduro riding and long trail use, with support for better control across varied terrain.
• Reduced drivetrain noise and chain turbulence: By allowing controlled chainring movement, the system helps calm the chain and reduce drivetrain chatter. This creates a quieter ride, which helps the bike feel more settled when the trail surface gets rough.
• Internally adjustable travel settings: The system comes set at 9° and can be adjusted to 6° or 12° inside the unit. This lets riders tune the amount of chainring rotation to suit their bike setup, terrain, and preferred pedal feel.
• Motor-mounted design for consistent behaviour: The spider mounts directly at the motor, so its action is not affected by wide-range cassette shifts. This helps the system deliver a more consistent response across the gear range.
• Re-engineered construction with improved sealing: The latest design improves impact resistance and helps protect the internal parts from dirt and contamination. This supports better durability, with elastomer replacement due at 100 hours and a full service due at 200 hours.

The SRAM Ochain E Spider B1 helps e-MTB riders gain better control where pedal feedback can unsettle the bike. Its adjustable travel, motor-mounted layout, and Bosch BDU38 CX Gen 5 compatibility make it a focused upgrade for riders who want a calmer drivetrain feel. The 104 BCD chainring fit also gives clear chainring compatibility for suitable setups.

Choose the SRAM Ochain E Spider B1 for a more stable, quieter, and better controlled e-MTB drivetrain setup. It is a practical upgrade for riders who want to reduce pedal kickback and improve ride quality on demanding terrain.

Specification:

• Spider system that decouples pedal feedback from the drivetrain
• Designed for e-MTB applications
• Reduces drivetrain noise and chain turbulence
• Improves braking and cornering stability on rough terrain
• Internally adjustable travel settings for drivetrain tuning
• Compatible with Bosch BDU38 (CX Gen 5) motor systems
• 104 BCD chainring compatibility
• Upgradeable to Ochain S using the external travel adjust upgrade kit
• Re-engineered construction for improved durability and contamination resistance
• Compatibility: Bosch BDU38 (CX Gen 5)
• Chainring compatibility: 104 BCD
• Travel settings: 9° factory setting, adjustable to 6° or 12°
• Included components: Ochain E spider
• Service interval: 100 hours elastomer replacement, 200 hours full service