110-Series features the strongest materials, most effective seals and the best aesthetics with a 110 year no-questions-asked warranty Contoured and relieved 7075T6 aluminum for minimized weight and maximized strength, with split-lip sealed stainless steel bearings Low friction, dualseal crown race and top cover provides maximum sealing from contaminants, plus a captured compression ring design for carbon steerer compatibility (Interlok spacer compatible, sold separately) Cane Creek Integrated 41.0mm ID (36x45), Campy Hiddenset 42.0mm ID (45x45) , ZS (ZeroStack), or EC (traditional, External Cup) available for 1", 11/8" and tapered steerers Internal parts are crosscompatible across the 10, 40 and 110 series