Specifications:

• ID (Bore): 50mm

• OD (Outer): 80mm

• Set Screws: Included (3 per bearing)

Compatibility:

• Standard 50mm rear axles.

• Standard 80mm bearing hangers/cassettes.

• Compatible with OTK chassis (Tony Kart, Kosmic, FA, Exprit) and other brands using 50mm/80mm sizing.