Wanting to build a tandem axle trailer to pull behind the Cat. Have found a set of 10x7x25 tires and rims at a reasonable price. Now just have to find some hubs and spindles. Anyone have a source for 4 bolt ATV style hubs? Dealer that has the tires and rims( new take offs from a CAT ) but doesnt seem to have a source for the hubs. Seems that ATV sims require a special hub?? as dimensions are different from standard trailer hubs.