Dick Bachman asked me: What is the lug-nut pattern on the 57-58 IMPS ........... thanks The lug nut pattern is 5 X 5 1/2, with 9/16 studs. The correct wheel size is 14 X 7. My question is which other year's of Imp had the same lug nut pattern. I run 15 inch Mopar wheels on my 58. My spare is on a Ford truck wheel. I am not sure if the Ford wheels were designed for 9/16 inch studs though. I have been told the wheel looked wobbly when I used it this year when I had a blow out on a cruise. I think the 5 X 5 1/2 pattern, with 9/16 inch studs may be a MOPAR thing only. The question is what years apply? Hugh