Bicycle Bottom Bracket Crank Arm Cover

Protective cap for the square-hole bottom bracket crank mounting on older Giant mountain bikes. This cap features a threaded design, installable with a flathead screwdriver. Its thickened inner wall ensures robustness, water and dust resistance, and importantly, prevents the loss of the crank fixing screw should it become loose or fall out. Facilitating easy reinstallation and repair. Approximate threaded mounting diameter: 22-20mm; Cap diameter: approximately 29mm. If your bicycle's bottom bracket crank mounting hole matches this size, this model is printable and may resolve your issue.