nismo34 Posted November 1, 2005 Share Posted November 1, 2005 Hey people. Need some help with tyre size. I have 225/45 ZR17 now on stock GTT rims 17x7.5. I want to fit 235/45 ZR17 is it possible? One shop told me it will effect my speedo? Cheers, Link to comment https://www.sau.com.au/forums/topic/93267-tyres/ Share on other sites More sharing options...
Wink Posted November 1, 2005 Share Posted November 1, 2005 It will but the amount will be very small (at 70mph, you're travelling at 71mph) See http://www.carbibles.com/tyre_bible.html for a calculator that can work these things out. Link to comment https://www.sau.com.au/forums/topic/93267-tyres/#findComment-1682705 Share on other sites More sharing options...
blind_elk Posted November 1, 2005 Share Posted November 1, 2005 In a word - Yes. I'm running 235/45x17 B/S G IIIs on a 7.5" rim. It will have next to no effect on the speedo - you are increasing the diameter of the tyre by less than 1cm. Link to comment https://www.sau.com.au/forums/topic/93267-tyres/#findComment-1682955 Share on other sites More sharing options...
leech_ Posted November 2, 2005 Share Posted November 2, 2005 i know a couple of people who ran or are running 235's on the stock gt-t rims but i dont think you can go any wider. When i replace my tyres i know i will be getting 235's Link to comment https://www.sau.com.au/forums/topic/93267-tyres/#findComment-1683486 Share on other sites More sharing options...
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