1.5` headset crown race with a 30mm inner diameterAllows forks with straight 1-1/8â steerer tube diameters to be used in frames designed for tapered 1-1/8â to 1.5â steerer tubesCompatible with headsets that have 1.5â lower headset bearing cupsCrown Race1.5` to 1-1/8` (52mm/30mm)UPC/EAN/GTIN: 888571116791