Bowtiez Posted February 4, 2012 Share Posted February 4, 2012 I have a Techno Toy R230 conversion on my 4 speed 260Z and a 425 horse SBC Chevy. I am using 5 on 5 x 4.5 adapters to run Gram Light 17 X 9.5 wheels with a 6 inch backspacing. No problem with breakage with either road racing with Kumho 700s or drag racing with the MT ET 275:40:17 drag radials but my sixty foot time sucks at 2 seconds and I want to try slicks. I have been advised that I should not use the adapters for safety reasons. This means I need 4.5 to 5 inches of backspacing. Most slicks come in 15s. Are there any 15s that will clear the Nissan Twin Turbo calipers with the backspacing I need for the 260Z? I have already cut the fenders and added ZG flares. I also have 16 X 8 wheels that do have 5 inches of backspacing but the Hoosiers have 12 section widths and the rim would be minimum width. Quote Link to comment Share on other sites More sharing options...
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