36T 38.8x11mm Electric Bike Steel Gear Oblique Teeth Gears With 7.94mm Bearings for Folding E-bike Hub Motor Helical Gear

36T 38.8x11mm Electric Bike Steel Gear Oblique Teeth Gears With 7.94mm Bearings for Folding E-bike Hub Motor Helical Gear

Aliexpress UK