Do most Pups have 4x4" bolt pattern? (mine does) Do diff. brands randomly vary between 4 & 5 lug patterns? Do smaller Pups all or mostly use 4 bolt, but when a Pup gets to 'X' GVWR, they all pretty much go to 5 lugs (higher capacity)? I am considering changing my 12" white steel wheels to HWT 12" aluminum wheels and want to know if we decided to upgrade say to a 12' box with a slide out down the road, what is the likelyhood I could use my 12" 4x4" wheels on the new(er) Pup? I'm guessing this larger trailer's GVWR might be 500+ lbs higher than my current Pup's 2200 GVWR. Would a higher cap. axle likely use a 5 lug pattern AND a 13" wheel?