
This bottom cup portion Cane Creek Forty series headset cup fits frames with a 1.5" integrated headtube (49.6mm inside diameter) and 1.5" forks with a crown race seat diameter of 39.79mm. It has stainless steel cartridge bearings protected from contaminants by an O-ring nicely formed on the crown race. The quality bearing is housed in a light and durable, AL-6061 T-6 cup.
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