Had to swap my left rear rim and turn it around so valve stem was facing on the outside instead of inside. Any how my question is when I put the rim back on I was trying to match how the other tire side was mounted and followed off of that noticed that their are like two different shin brackets that mount to the rim. I pushed rim all the way on and put mounting shins on the first bevel groove on the rim towards the outside of tire. I have noticed their are different tractor that have different set ups on them what?s the difference also would like to know what?s the difference between fixed and adjustable shins that mount on rim I don?t want to have a wobbly tire and rim on tractor.