The Compact Electric Gear Hub Motor is designed for OEM e-bike projects that need rear hub motor power, electronic internal shifting and drivetrain matching in one compact rear-wheel system. This configuration page focuses on chain or belt drivetrain planning around the R900 hub motor gearbox reference product.

For city e-bikes and utility e-bike platforms, the choice between chain and belt drivetrain affects frame layout, service strategy, rear-wheel spacing and component matching. R900 provides an integrated motor-and-gearbox direction that can be evaluated for either drivetrain path, with final matching confirmed through drawings and project validation.

This product direction is useful when a buyer is not only searching for a motor, but for a compact drive module that can reduce separated rear-wheel assemblies and support electronic shifting. The page should not be presented as a separate physical SKU or as a complete belt or chain kit.

• Chain Or Belt Matching Focus: Built around the source-listed drivetrain matching direction for R900.
• Integrated Rear-Wheel System: Combines hub motor packaging with electronic 3-speed gearbox functionality.
• Compact OEM Architecture: Supports cleaner rear-wheel system planning for urban and utility e-bikes.
• Gear-Drive Motor Structure: Uses the R900 gear-drive rear hub motor reference configuration.
• Project-Specific Control Matching: Controller and CANbus matching direction should be confirmed before sampling.
• No Kit Overclaim: Do not claim chain, belt, sprocket or belt cog components are included unless the project scope confirms them.