Evening all. Anyone have one of those old ifor williams hay trailers - single axle, carry 3ton, and has 9 inch split rim wheels? I need new wheel/tyre for mine! I've been told that 185/60/12 is interchangable with them - due to a lower profile tyre I guess. There is only about an inch of clearance between the tyre and trailer floor on the original wheel tyre, so the new wheel can't be much bigger! Maybe I'll have to buy 2 new wheels and lower the axle. Cheers.