Quick release skewers, thru-axles and seat post clamps.
Quick release skewers let you remove wheels without tools, which is essential for fixing punctures, transporting bikes in cars and storing bikes in small spaces. Thru-axles are stiffer and more secure and are common on modern mountain bikes and road bikes with disc brakes. Seat post quick release clamps let riders adjust saddle height quickly, which is useful for shared bikes and family bikes. Check the axle type, length, diameter and thread pitch before ordering, as thru-axles must match the frame and fork exactly. Locking skewers that need a special key help prevent wheel theft in cities. Tighten quick releases properly before every ride for safety.
Clamps: pipe clamps.
Related categories: Bicycle Parts, Bicycle Saddle, Bicycle Grips