Ritchey's Comp Logic Threadless Headset uses the Pro Logic design but with more affordable semi-sealed cartridge bearings for a reliable replacement headset for recreational riding or racing. It's compatible with straight 1 1/8" headtubes and features deep, machined-alloy cups for lightweight strength and a secure installation.
Semi-sealed cartridge bearings. 30.2 mm stack height. Compatible with 1 1/8" head tubes. S.H.I.S. measurements: EC34/28.6 upper, EC34/30 lower.