36V-48V Left-Out Electric Bicycle Motor Gear and Clutch Kit – 36-Tooth Silent Nylon Planetary Gears, 250W-500W, Left-Out, Plug-and-Play Repair for Mountain Bikes and Women's Electric Bicycles

This product is a dedicated internal clutch gear set for left-out hub motors in electric bicycles. It contains three precision nylon gears and is specifically designed and manufactured for 250W, 350W, and 500W hub motors. As a core component of the motor's transmission system, this gear set effectively repairs problems such as abnormal motor noise and power transmission failure caused by gear wear, making it an ideal spare parts solution for electric bicycle repair and maintenance.Technical SpecificationsApplicable Motor Power: 250W / 350W / 500W Hub MotorGear Material: Engineering Grade Reinforced Nylon (PA66 + 30% Glass Fiber)Number of Gears: 3-piece complete setOperating Temperature Range: -30℃ ~ 120℃Abrasion Resistance Grade: Complies with ISO 1328-1 standardColor: Original White/Black (Random Shipment)Core Advantages1. Precision Engineering ManufacturingHigh-Precision Tooth Profile: CNC precision machining, tooth profile error ≤0.05mmOptimized Tooth Surface Design: Special tooth surface treatment reduces the coefficient of friction and improves transmission efficiencyDynamic Balancing Calibration: Each gear set undergoes dynamic balancing testing to ensure smooth operation2. Superior Material PerformanceHigh-strength Nylon Base Material: Tensile strength ≥80MPa, flexural strength ≥110MPaAbrasion-resistant Additives: Added molybdenum disulfide and silicone oil to enhance self-lubricating propertiesFatigue Resistance: Withstands over 1 million cycles of load testingDimensional Stability: Water absorption <1.5%, low temperature deformation3. Quiet OperationNoise Reduction Design: Special backlash design reduces operating noise by over 40%Shock Absorption: Nylon material naturally absorbs shock, reducing transmission impactSmooth Meshing: Involute tooth profile ensures smooth power transmission4. Compatibility Information;Applicable Motor Types: Front-drive/rear-drive hub motors, brushed/brushless motors (internal structure needs confirmation), 36V/48V voltage systems, single-speed/multi-speed motor configurations, other standard hub motor specifications.5. Inapplicable Situations;High-power motors exceeding 500W, mid-drive motors, non-standard sized special motors, motor housings with severely damaged gears.

• This built-in left-side cable-out clutch gear assembly contains three high-quality nylon gears and is designed for external hub motors in 250W, 350W, and 500W e-bikes. It is ideal for repairing worn drivetrain components or upgrading the internal drivetrain of an e-bike
• Designed for common hub motor models, it directly replaces original parts. Installation is simple—just open the motor housing, replace the worn gears, and reassemble
• These gears are made of reinforced engineering-grade nylon, offering superior wear resistance, smoother operation, and lower noise compared to metal gears. They provide reliable performance under normal riding conditions
• It is a standard left-side cable hub motor suitable for most common 250W, 350W and 500W electric bicycles
• Includes all three critical gears needed to replace the clutch assembly. Repair your existing motor without replacing the entire motor, saving time and money.