I bought a pair of these and I like them. Basically a SS sleeve that goes over the axle shaft shoulder and the seal is sized to go over the sleeve. So the seal is sealing against the SS sleeve vs the axle shaft shoulder. So if the shoulder is grooved or rusted or other imperfections it will not matter.
They say you need a Bearing Buddy to keep things lubricated.
They say you need a Bearing Buddy to keep things lubricated.