Green Wheel bearing help

They are the same type single row bearings that have been used on the rear of cars for a very long time. I've never cut one apart, but I suspect they are the deep groove type bearings described. Were they not, I would imagine we'd be reading about a lot more failures, which we are not. A deep groove bearing simply means that the balls run in a groove both in the inner and outer races, which I feel sure the green bearings have.