Linear castors

I wanted to come up with some linear castors for a pull out shelving unit, castors were rotating on their axis and getting stuck.I had some 608 bearings in my maker box so decided these would be my “wheels”, we all know wheels need tyres so I knocked up some TPU tyres.These can be quite fiddly to get on - the tolerances are tight, if you push the bearing in perpendicular to the “tyre” then use two flat surfaces either side of the bearing and tyre and press them together the bearing pops in.I the