Crown races for Cane Creek headsets fit a variety of lowers and crown race seat diameters.Compatible with 52mm lower headset bearingsCompatible with 40mm (1-1/2") tapered steerer tubesDurable steel constructionCompatible with 10-, 40- and 110-Series headsets and backwards compatible with S and XX SeriesIntegral mold seals keep out the elementsItem SpecificationsCrown Race40 Cane Creek Crown Races Crown Race UPC: 840226076690