The Halo series of bearings are a high quality steel/chrome bearing with metal shields. These bearings have been tested and proven by many racers.
4x13x5 Metal Halo bearing by Avid Racing Concepts is a popular bearing for Tekin motors. Check your manual for the correct size for your vehicle if you are not certain.
Bearing Dimensions
METRIC: 4mm (Inner) x 13mm (Outer) x 5mm (Width) STANDARD: 0.15748" (Inner) x 0.51181" (Outer) x 0.19685" (Width)
Kina