You can stay with the same size 14″ or jump up to 15s but you will have to keep the diameter about the same. If your wheels arent shot I would stay with the 14s, unless you just want to dress up the trailer with new wheels. My 01 P3 has 215/70R15s on it and I replaced with the Cooper Cobras and am very happy with the ride and look.Last edited by 1stinLA on July 26th, 2010, 7:37 pm, edited 1 time in total.