SRAM Ochain S Spider B1

SRAM Ochain S Spider B1 is an e-MTB spider system built to reduce pedal kickback and improve bike control on rough terrain. Its next-generation spider mechanism lets the chainring rotate backward, which helps separate the rider from pedal feedback forces. This helps reduce drivetrain noise, calm chain movement, and give the bike a more stable feel on demanding trails.

Key Features and Benefits:

• Pedal feedback decoupling spider system: The spider allows the chainring to rotate backward when the suspension is active, which reduces pedal kickback through the drivetrain. This helps the bike stay calmer over rough ground and gives the rider better control when the trail gets steep or broken.
• E-MTB specific design: The Ochain S is made for electric mountain bikes, where motor power, bike weight, and suspension movement place high loads on the drivetrain. This gives e-MTB riders a system that suits the extra demands of hard trail and downhill use.
• External travel adjustment: The system offers Lock, 3°, 6°, 9°, and 12° travel settings, so riders can tune the amount of chainring rotation without changing the whole setup. This makes it easier to match the spider to the bike, terrain, and preferred ride feel.
• Motor-mounted performance: The spider is mounted at the motor, so its action stays consistent across cassette gear changes. This gives a more natural feel through the pedals and helps the system work in a predictable way on mixed terrain.
• Reduced noise and chain turbulence: By limiting pedal feedback and chain movement, the Ochain S helps reduce drivetrain noise over rough sections. This gives the bike a quieter, more settled feel when the suspension is working hard.
• Re-engineered durability and sealing: The latest B1 design has improved impact resistance and better sealing against dirt and water. This helps protect the mechanism from contamination and supports reliable use in harsh trail conditions.

The SRAM Ochain S Spider B1 helps riders keep the bike stable when braking, cornering, and riding through rough sections. The adjustable travel settings make it suitable for a wide range of e-MTB setups, while Bosch BDU38 (CX Gen 5) and 104 BCD chainring compatibility make fitment clear and practical. Regular service intervals also help keep the system working as intended.

Choose the SRAM Ochain S Spider B1 for a quieter, more composed e-MTB setup with adjustable control over pedal feedback and chainring movement.

Specification:

• Spider system that decouples pedal feedback from the drivetrain
• Designed specifically for e-MTB applications
• External travel adjustment with selectable travel settings
• Improves braking and cornering stability on rough terrain
• Reduces drivetrain noise and chain turbulence
• Compatible with Bosch BDU38 (CX Gen 5) motor systems
• 104 BCD chainring compatibility
• Re-engineered construction for improved durability and contamination resistance
• Compatibility: Bosch BDU38 (CX Gen 5)
• Chainring compatibility: 104 BCD
• Travel settings: Lock, 3°, 6°, 9°, 12°
• Included components: Ochain S spider
• Service interval: 100 hours elastomer replacement, 200 hours full service