The Press Fit BB-RS500-PB bottom bracket is recommended by Shimano for the GRX, Tiagra, Sora and Claris series. This allows a Hollowtech II or 2-piece crank with a 24 mm axle to be mounted in a road frame with an 86.5 mm bottom bracket width and a 41 mm shell diameter. The bottom bracket is made from a synthetic material and has black bearing cups.
- Application: Road, Gravel, City
- Type: PressFit BB86
- Shell Diameter: 41 mm
- Shell Width: 86.5 mm
- Axle Diameter: 24 mm (Hollowtech II)