Headset Cartridge bearing: Outer: 52 / Inner: 40

Pro Headset Cartridge Bearing – 52 mm Outer is a high-quality replacement bearing designed for use in compatible 52 mm-OD headset assemblies.

This sealed cartridge bearing delivers smooth, low-friction steering performance and reliable durability, helping ensure consistent headset rotation and precise handling. Ideal for servicing worn or noisy headsets, it’s engineered for long life with robust seals that keep out moisture and dirt. Whether you’re refreshing a road, gravel, or mountain bike headset, this bearing helps maintain confidence-inspiring steering performance.

Specifications: 

• Outer: 52mm
• Inner: 40mm
• Height: 8mm