earth europe light
heart light
Compatibility Any frame that uses ZS (Zero Stack) headsets with 44mm upper and 56mm lower head tube inner diameter. Uppers and lowers sold separately. Enduro black oxide steel sealed bearings included on both the upper and lower. Custom-molded dual-lip seal on the crown race protects lower bearing in the toughest conditions. All components precision machined in-house at Wolf Tooth from aircraft grade aluminum to ensure the highest level of quality. Service and additional parts available.