A great upgarde or replacement for any cycle with a square taper fitting chainset, ultra smooth & long lasting for hassle free cycling. A good quality bottom bracket for traditional chainsets Super-accurate bearings for smooth operation & enhanced durability Durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting Lightweight hollow spindle Maintenance-free sealed cartridge bearing assembly keeps out dirt, mud, & water for long bearing life Fast & easy installation without adjustment Narrow diameter body allows clearance for any cable guide mount attached to the bottom bracket