Hey yous, what type and size bearings am I ordering for these Roper wheels? And the rear wheel on the right has a spacer that not only goes the length of the inside wheel ,like the front on the left does, but sticks out on both sides. Do I need to keep it like that or can I get new bearings and just use the axle? I assume I need to tap these out to get behind the bearings to tap them out anyway.