You should be able to read the bearing size imprinted on the seal of the bearing. They are standardized industry sizes. There are various typs of seals so be sure to pay attention to them as the bearing code will be the same, but the shield code can vary. I think the last set of bearings took out had the -2RS code for double seal.


Z - Single shielded
ZZ - Double shielded
RS - Single sealed
2RS - Double sealed
V - Single non-contact seal
VV - Double non-contact seal
DDU - Double contact seals
NR - Snap ring and groove
M - Brass cage


Tom