Features: Tapered roller bearings consist of outer ring, inner ring, rollers and a cage. This bearing contains tapered rollers for its rolling element which are guided by the inner ring backface rib on the roller large end face. The raceway surfaces of inner ring and outer ring and the rolling contact surface of rollers are designed so that the respective apexes converge at a point on the bearing center line. Kits with specially designed seals to keep water and dirt out and grease in. Products are tested by model; installation and all functional aspects comply with standard requirements. Package Includes: 1 Set Bearings Specifications: Material: Metal Size: As shown in picture Fitment: CRF 50cc - 250cc Item: 91683/22.5 & 91683/24 Bearings Type: Taper Roller Pressure Bearing Model: 91683/22.5 Inner Diameter: 22.5 mm Outer Diameter: 41 mm Model: 91683/24 Inner Diameter: 24 mm Outer Diameter: 41 mm Grade: ABEC-1 Normal Quality Note: 1. Please allow 1-2 cm errors due to manual measurement. Ensure you are comfortable with this before ordering. 2. Due to differences in monitor displays, the picture may not reflect the actual color of the item. Thank you for your understanding.