Diagram A: 1/4"
Diagram B: 3/4"
Genuine RBI Bearing. Made in China.
This bearing coms in both a sealed and a shielded version. Please select between the two below. Select "seals" for a sealed bearing or "shields" for a shielded bearing.
This bearing can be found with the following part numbers on it:R4-2RS, R4 2RS, R4 RS, R4RS, R4-ZZ, R4 ZZ, R4ZZ, R4 Z