I have some 3500 pound trailer axles - idler axles are $290 each - comes with loose saddles so you can put them where you need them. Sizes on hand are 95 (95/80) hub face - 89 (89/74) and 85 (85/70) also these fit trailers with a 82 inch - 76 inch and 6 foot trailer floors respectively. Give or take an inch or two.