The Ritchey 36deg Bearing Adapter For Ritchey WCS Carbon Adventure Fork allows 36deg headset bearings, such as those from Chris King, to fit the Ritchey WCS Carbon Adventure fork that features a 45deg crown race. Features: Adapts the Ritchey WCS Carbon Adventure Fork with a 45deg crown race to work with 36deg headset bearings Fits with 1-1/8" straight steerer with integrated 45deg crown race Adventure fork Use of this adapter will effectively increase fork length by 4.4mm Will work with all Ritchey carbon fiber 1-?" straight steerer forks with possible slight cosmetic differences