The Ritchey Comp Upper Bearing IS-42/28.6 is a precision headset component designed to deliver smooth steering performance for bikes using an internal 42 mm headtube with a 28.6 mm fork steer tube. This upper bearing carries the load between the fork and frame while minimizing friction, helping ensure confident, responsive handling across a wide range of riding conditions. Built to Ritchey’s practical standard of durability and value, this bearing pairs perfectly with other Comp-series headset parts or as a replacement for worn units.

Constructed with sealed cartridge bearings, the Comp Upper Bearing keeps out dirt and moisture, reducing wear and extending service intervals. The bearing’s robust design delivers consistent, low-friction rotation and long-term reliability without introducing unnecessary weight or complexity. Its precise dimensions match standard IS-42/28.6 headset interfaces, making installation straightforward in compatible frames and ensuring seamless interaction with the lower bearing and headset cups.

Whether you’re refreshing an older bike’s headset or building a new build with Ritchey Comp components, this upper bearing provides dependable performance that keeps steering smooth and accurate. Its durable construction makes it a great choice for daily rides, commuting, or recreational cycling where consistent feel and long life are important.