3-Speed Hub Motor Gearbox For Urban Commuter E-Bikes

R900 is designed for urban commuter e-bikes and utility bicycle platforms that need a compact motor drive system with integrated electronic 3-speed shifting. The standard 36V configuration combines 250W / 350W rated power, 50 N.m maximum torque and a 162% total gear ratio to support daily starts, cruising, moderate climbing and loaded city use.

PedalFlow™ technology helps the system shift while pedaling, reducing the sense of interruption that riders may feel when drivetrain and motor behavior are not well coordinated. For daily commuting, this means smoother acceleration from traffic lights, steadier climbing support and quieter rear-wheel operation.

With 148 mm O.L.D., chain or belt drivetrain options, Disc Brake / V Brake versions, ≤55 dB noise level and IPX6 waterproof rating, R900 is suitable for city e-bikes, commuter platforms, utility e-bikes and urban mobility models where ease of use and low routine maintenance exposure are important.

• Urban Commuter Focus: Designed for daily city e-bike and utility bicycle use.
• Integrated 3-Speed Hub Motor Gearbox: Combines motor drive and electronic shifting in one rear-wheel system.
• PedalFlow™ Shifting Technology: Supports smoother shifting while pedaling.
• 50 N.m Motor Max Torque: Supports starts, acceleration and moderate climbing.
• 162% Total Gear Ratio: Provides practical three-speed coverage for urban riding.
• Quiet Rear-Wheel Operation: ≤55 dB noise level supports commuter comfort.
• Chain / Belt Drivetrain Matching: Allows different city e-bike drivetrain directions.
• Disc Brake / V Brake Versions: Supports different urban e-bike brake layouts.
• IPX6 Waterproof Rating: Suitable for regular outdoor city use.

For commuter and utility e-bikes, the value of R900 is the coordination between motor drive and electronic 3-speed shifting. PedalFlow™ technology supports gear changes while pedaling, helping the bike maintain smoother drive behavior when riders accelerate, climb or restart in traffic.

The integrated hub motor gearbox layout keeps the main drive and shifting system inside the rear-wheel unit. This supports cleaner vehicle design and reduces the visible complexity of the drivetrain compared with layouts where motor drive and shifting are handled separately.

R900 is suitable for urban commuter e-bikes, city e-bikes, utility e-bikes, light cargo bicycles and daily short-distance mobility platforms that need smoother starts, quiet operation and a compact rear-wheel drive system.

Before sampling, OEM teams should confirm 148 mm O.L.D., brake type, chain or belt drivetrain, wheel specification, cable routing, controller interface, vehicle weight, expected cargo load and daily operating environment.

Q: What is the main application of this page?
A: It focuses on R900 use for urban commuter and utility e-bike projects.

Q: Is R900 suitable for daily city riding?
A: Yes. R900 is designed for city e-bike and commuter platforms that need smooth starts, moderate climbing support and quiet operation.

Q: What is the noise level?
A: The source information lists ≤55 dB.

Q: Does R900 support belt drive?
A: Yes. The published drivetrain matching direction includes chain or belt.

Q: What is the weight difference between chain and belt versions?
A: The chain version is 3.8 kg and the belt version is 3.9 kg.

Q: Should certification be listed on this product page?
A: No. Certification is not published for this page.

Q: What should OEM teams confirm?
A: Confirm frame structure, O.L.D., brake type, chain or belt layout, wheel specification, controller matching and operating environment.