Darkone Posted January 26, 2008 Share Posted January 26, 2008 hey thought i would give you guys a web site to check out i used 1010tires.com to get the right size tire combinations 4 a 17 inch wheel tire combo that would keep my speedo abpout the same and i found there calculator tells you speedo difference the tires and wheels im going with put my speedo .666 to slow so at 60 on the speedo it says that i will actualy be going 59.6 mph thought this might help Quote Link to comment Share on other sites More sharing options...
ktm Posted January 27, 2008 Share Posted January 27, 2008 It's actually a lot easier than going to a website. Smaller than stock diameter means you will over-estimate your speed, larger than stock diameter means you will under-estimate your speed. Stock rolling diameter (for a 240z with 195/70R14) is 14 + 195/25.4*0.70*2 = 24.7 inches. Learning how to do the calculation is much more valuable than knowing the website address. Quote Link to comment Share on other sites More sharing options...
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