12x24x6 Rubber bearing (6901-2RS) by Avid Racing Concepts is the standard bearing for the HPI Baja 5B. Check your manual for the correct size for your vehicle if you are not certain.
Bearing Dimensions
METRIC: 12mm (Inner) x 24mm (Outer) x 6mm (Width)
STANDARD: 0.47244" (Inner) x 0.94488" (Outer) x 0.23622" (Width)