Are your head bearings coming undone? Chances are the OEM Star Nut keeps slipping up the steering tube. This kit delivers a threaded rod that runs through the steering tube and compresses the lower and upper triple clamps, guaranteeing your head bearings stay snug. The lower machined retaining nut has two 5mm threads to mount a fender, plus four black steering tube height spacers (20mm, 15mm, 5mm, and 3mm).