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Ochain S Chainring Spider (B1)

916218237000-OCHAIN-S-BOSCH-BDU38-OEMC-S
916218237000-OCHAIN-S-BOSCH-BDU38-OEMC-S.png?VersionId=h5W.q7s89tVuywvh78VifVk
916218237000-OCHAIN-S-BOSCH-BDU38-OEMC-3Q.png?VersionId=TXJw9Q8PmVVzfPhancw
Ochain R and S Exploded View
Ochain Compatibility
916218237000-OCHAIN-S-BOSCH-BDU38-OEMC-S 916218237000-OCHAIN-S-BOSCH-BDU38-OEMC-3Q Ochain R and S Exploded View.png?VersionId=JK Ochain Compatibility
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Ochain
Where To Buy
Free shipping on orders over $49 (continental U.S. only).
International shipping available. Some exclusions apply.
Free shipping on orders over $49 (continental U.S. only).
International shipping available. Some exclusions apply.
$350.00
Free shipping on orders over $50 (continental U.S. only).
International shipping available. Some exclusions apply.
Free U.S. shipping on everything.
International shipping available. Some exclusions apply.

Specifications

Product
Ochain S Chainring Spider (B1)
Intended Use
E-Bike
Chainring Type
Other: Spider
Speeds
1x
Tooth Count
(Chainring sold separately – compatible SRAM chainrings with a 104 BCD are available in 32, 34, and 36 tooth options)
Hole Pattern
Bosch BDU38 (CX Gen 5) motor interface (part no: 00.6118.794.000)
Materials
Premium-grade aluminum
Colors
Black
Weight
 
Miscellaneous
  • Generation: B1 | Available: April 2026 | Model year designation: 2027
  • Model code: DS-OCHAIN-S-B1
  • The top model for e-bikes, featuring External Travel Adjust with selectable degrees of travel
  • Re-engineered impact resistance and enhanced sealing for better contamination resistance and longevity
  • External Travel Adjust: selectable travel of lock, 3°, 6°, 9°, or 12°; tool-free dial adjustment
  • 104mm BCD chainring compatibility only; chainring and hardware not included
  • Ochain spiders are not compatible with every frame and every crankset on the market
  • Includes: spider
  • Elastomer replacement interval: 100 riding hours
  • Full service interval: 200 riding hours
  • Compatible with aluminum chainrings only; steel variants are not compatible with any Ochain model
  • Updated models are marked "B1" on the back; earlier models carry a numerical model code (01–05)
  • 2-year warranty
    • Price
    $350.00
    More Info

    Ochain is a 1x 104mm bolt-circle diameter (BCD) spider damper that replaces the current spider on the crank or a direct-mount chainring.

    Ochain allows the chainring to rotate rearward to disengage the transmission from the rider and chassis, improving the riding experience and bicycle performance by reducing noise and pedal feedback, allowing for greater chassis stability and fewer distractions.

    Ochain website

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    Where To Buy
    Free shipping on orders over $49 (continental U.S. only).
    International shipping available. Some exclusions apply.
    Free shipping on orders over $49 (continental U.S. only).
    International shipping available. Some exclusions apply.
    $350.00
    Free shipping on orders over $50 (continental U.S. only).
    International shipping available. Some exclusions apply.
    Free U.S. shipping on everything.
    International shipping available. Some exclusions apply.
    Chainrings