A motorcycle helmet lasts about five years, though its lifespan can vary depending on materials, exposure to sun and sweat, and maintenance
#2 is the oscillation worm gear, and you can see a tiny rubber ring on its fore part to stop any play between it and the oscillation drive gear #5
At 17.5kg including the battery pack, the Pure Flux One is pretty light for an e-bike (sitting in between the 18.9kg Cowboy and the 13.1g Ribble Hybrid ALe) , and the position of the bottle-style battery means the center of gravity is roughly central to the frame, making it easy to pick up and carry
Quick release lock on edging for that finished look
Treble hooks: a versatile alternative The treble hooks consist of three points arranged in a star around a central axis
Padding foam (often polyurethane) : Adds comfort and moisture-wicking inside the helmet while slightly aiding minor shock absorption