Tangeseiki Headset BearingDESCRIPTION Tange Seiki Japan makes the most respected top notch replacement bearing for headsets in the cycling industry. Periodic replacement of headset bearings is necessary to eliminate play for smoother, more effective steering. The headset bearing is a vital part of any bicycle, as it helps to precisely and smoothly rotate the bikes handlebars. If youre experiencing play (unwanted movement) in your headset, or a rough grinding when you turn the