13x21x5 Revolution bearing (6801X-RSZ) by Avid Racing Concepts is a high quality steel/chrome bearing. Our bearings have been tested and proven by many racers. Check your manual for the correct size for your vehicle if you are not certain.
METRIC: 13mm (Inner) x 21mm (Outer) x 5mm (Width)
STANDARD: 0.51181" (Inner) x 0.82677" (Outer) x 0.19685" (Width)