Rotor PressFit PF4124 PF41-86/89/92-24 Bottom Bracket Bearings

The Rotor PressFit 4124 Ceramic bottom bracket is designed for riders seeking maximum pedalling efficiency and smoothness. It allows cranksets with a 24 mm hollow spindle (such as Rotor 24mm cranksets or the Shimano Hollowtech II standard) to be fitted to frames designed for the PressFit 41 mm standard.

With its ultra-high-precision sealed ceramic bearings, this bottom bracket minimises friction, ensuring exceptional smoothness and a longer service life by reducing wear caused by mechanical action and exposure to the elements.

Key Features:

• Ceramic Bearings: Dramatically reduced rolling resistance and greater longevity than conventional steel bearings.

• Spindle Compatibility: For cranksets with a 24 mm spindle (Rotor 24mm, Shimano Hollowtech II).

• Frame Standard (BB41): Compatible with PressFit bottom bracket shells with an internal diameter of 41 mm.

• Shell Width: Versatile compatibility with Road (BB86 - 86.5 mm) and MTB (BB89.5 / BB92 - 89.5 mm or 92 mm) standards.

• High-Quality Construction: 7075-T6 aluminium cups machined using CNC, with silicone seals to protect the bearings from water and dirt.

Technical Specifications: 

• Bearing Type: Ceramic

• Frame Shell Diameter: 41 mm

• Crankset Spindle Diameter: 24 mm

• Use: Road / MTB / Gravel