Wheel hub reduction adapter GEKO 32→22.2 mm for brake discs

GEKO wheel hub reduction adapter 32→22.2 mm is a mechanical centring sleeve designed to allow brake discs with a 22.2 mm center bore to be fitted on hubs with a 32 mm bore. It provides a precise fit between hub and rotor, restoring concentricity and ensuring the disc is held firmly in place. The adapter is intended as a practical compatibility solution when replacing or upgrading brake rotors on motorcycles, bicycles or similar wheel assemblies that use these bore dimensions.

Advantages

The adapter offers a simple, low-cost method to match differing bore sizes without machining the hub or disc. By filling the gap between a 32 mm hub bore and a 22.2 mm disc bore, it restores correct alignment and helps reduce vibration and uneven pad wear. The design requires minimal tools for installation and can be reused if removed carefully. Its compact form factor maintains original rotor positioning and brake geometry when used as intended.

Suitable for

• Mounting brake rotors with a 22.2 mm centre bore onto hubs with a 32 mm bore
• Temporary or permanent compatibility adjustments during repairs or part replacement
• Upgrades where rotor and hub bore sizes do not match

Key specifications

• Input bore diameter (hub): 32 mm
• Output bore diameter (rotor centre): 22.2 mm
• Function: concentric reduction/centering sleeve for brake discs
• Material: metal suitable for mechanical centring (manufactured for hub/disc tolerance use)
• Form factor: cylindrical sleeve designed for press/slide fit into hub bore

How to use

Before installation, clean the hub bore and the rotor centre to remove dirt, grease and corrosion. Check that the rotor and hub are free from damage and that the dimensions match 32 mm hub bore to 22.2 mm rotor bore. Fit the adapter into the hub bore—depending on interference fit it may require light pressing or gentle tapping with a soft-faced mallet. Slide the rotor onto the adapter so the rotor centre seats fully against the adapter shoulder. Reinstall wheel fasteners or retaining hardware and torque to the manufacturer’s specified values. After assembly, spin the wheel and inspect for runout; make any necessary adjustments to ensure concentric rotation.

Usage recommendations

Use the adapter only where the hub and rotor bore dimensions match those listed. Verify fit and secure seating before final tightening. Do not use if the adapter or mating surfaces are damaged or excessively corroded. For critical safety applications, check torque values and runout with appropriate tools and, if unsure, consult a qualified technician.