I've got the same rims as you & the same problem. The large centre nuts on mine do not pry off, they are threaded & need to be unscrewed. I couldn't find a large enough spanner so i tried one of those oil filter remover thingys that wrap around the filter & then tighten. Guess what ..... they work brilliantly, the nuts are not on very tight & the thingy removes them easily ..... all this for $5 & I don't need to carry around a huge stilson in the boot.