Ritchey Comp Classic Headset Nothing But The Classics Nothing beats the classics. The Ritchey Comp Classic Headset is the reliable workhorse of the Ritchey headset range. Available with the timeless high-polish finish, this smooth and reliable specimen features lightweight, precision-machined aluminum construction, sealed cartridge bearings, and comes packed with Ritchey Grease. A sealed design promises minimal penetration from the elements. The Classic Headset adds that classy and reliable detail your bike deserves. Features Stainless steel angular contact Ceramic Hybrid Cartridge (ACB) - Ti Coated Smooth and reliable and features lightweight, precision-machined aluminum construction, sealed cartridge bearings, and comes packed with Ritchey Grease Sealed design promises minimal penetration from the elements SPECIFICATIONSTechnical Description IS42/28. 6Top Type IS42/28. 6Top Head Tube Inside Dia. 1-1/8"Stem Clamp Dia. -Top Stack Height8. 3mm Top Bearing Type Sealed Cartridge Material Aluminum Weight N/AManufacturer's Part Number33075347003Cane Creek Headset Finder To figure out which headset you need for your particular frame and fork, see Cane Creek's Headset Finder by clicking HERE. | Ritchey | Comp Classic Headset Upper, 8. 3Mm Stack, Is42/28. 6