Sunlite SL55 Bottom Bracket

This unit is designed for frames with an English threaded bottom bracket shell, which is the most common standard for modern bicycles. It specifically requires a shell width of 73 mm, so please measure your frame's bottom bracket shell width before purchasing to ensure a proper fit.

The Sunlite SL55 is compatible with standard square taper JIS cranksets. If your existing cranks use a different interface, such as Splined or Hollowtech, this bottom bracket will not be compatible.

This model features a 118 mm spindle length. It is critical to match this length to your specific crankset's requirements, as an incorrect spindle length will prevent your chainline from aligning properly, leading to poor shifting or mechanical issues.

No, it is designed for minimal maintenance. The sealed bearing construction protects the internal components from dirt, water, and debris, making it a 'set it and forget it' component for most riders.

You will need a standard bottom bracket tool compatible with the splines on the alloy cups, along with a torque wrench or a long-handled wrench to ensure it is tightened to the manufacturer's specifications. If you are unfamiliar with the process, a local bike shop can handle the installation quickly.