Sunrace Sealed B/B Cartridge For Cottered Axle 68M X 136MM

This Sunrace sealed cartridge bottom bracket is designed for bikes with cottered cranks and a 68mm shell width. The 136mm axle length makes it suitable for standard road and hybrid frames where you need a straightforward replacement or upgrade. The sealed cartridge design keeps dirt and water out, which means less maintenance and longer bearing life compared to older loose-ball systems.

If your bike has cottered cranks and you're looking to improve reliability without replacing the whole crankset, this is a practical choice. It's the kind of part that just works quietly in the background, let