How do you know what seal to use as a replacement for a trailer hub?
When you replace the bearing it seems straightforward - the numbers on the existing bearing can be used to pick a new one. But how do you know what seal is correct? Is there some kind of index or cross-reference to the bearing? Would the inside opening of the hub (bore) also have to be measured?
In my specific case my inner bearing is an 4t-lm48548 but I mean this to be more of a general-purpose question.