The balls in AC bearings are withing 5/1

check your owner's manual or view our blog to learn how to identify the correct headset

These are for use with 104 BCD chainrings or 64 BCD chainrings on 104 BCD cranksets

Tip: If you are combining our Warm Up cream with an Amino cream

please check with your frame and fork manufacturer

Hope Head Doctor Headset Preloader - Blue netsuite-webdata-created The balls in AC bearingsRe tightening your headset becoming a common problem? Hope has produced a solution with two aluminium wedges which pull together and expand inside any 1. 1 8 steerer, giving you a solid thread to pull the stem down on. Top it off with an anodised aluminium cap and bolt, laser etched with Hope's logo. NOTE: Before use; take apart and grease all if the internal threads and surfaces that have to slide against one another (NOT the surface that will touch