The component with the lowest price in the REAR WHEEL schematic is the Washer, Plain.
In this schematic the "Bolt, Hexagon Socket Head" is used most often.
Parts such as the Rear Wheel: Cap Rear Wheel, Rear Tire Set(michelin), Bolt, Hexagon Socket Head, Hub, Rear are included in the Yq50 Aerox 2001 5pu6 Spain 115pu-300s1 Rear Wheel parts fiche.