The Ochain Base Chainrings are a reliable option for riders looking to refresh or fine-tune their drivetrain setup. Designed with a 4x104mm BCD pattern, these chainrings fit a wide range of cranksets, making them a versatile choice for mountain, gravel, or all-terrain builds.
Each ring includes four mounting nuts for easy installation, ensuring a secure fit and consistent performance on demanding rides. Whether replacing a worn ring or customizing gearing, the Ochain Base delivers dependable engagement and smooth power transfer.
4x104mm BCD fits many common crankset standards for broad compatibility
Includes 4 nuts simplifies installation and ensures a solid connection
Durable construction built for consistent performance and long wear life
Ideal for drivetrain tuning easily swap sizes to match terrain or riding style
Specifications & Identifiers
Chain Compatibility
10-Speed, 11-Speed, 12-Speed
Chainline/Hub Compatibility
141/148 Boost Hubs
Chainring BCD
104mm
Chainring Position
Chain Retaining Single Ring
Color
Black
Defined Color
Black
Designed for ebike
Yes
Intended Use
E-Bike, Mountain
Offset
0mm
Round or Oval
Round
Special Features
Narrow-Wide Tooth Profile
Speeds
10-Speed, 11-Speed, 12-Speed
Tooth Count
32t, 34t, 36t
Black - 32 UPC
739988404318
Black - 32 MPN
CHO32N
Black - 34 UPC
739988404325
Black - 34 MPN
CHO34N
Black - 36 UPC
739988404332
Black - 36 MPN
CHO36N
Tree Fort ID:
333222475481
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