tom_gr7 Posted October 16, 2014 Share Posted October 16, 2014 Hi guys, I've got 215/45/17's my mates got a set of 215/50/17's for sale. So can i switch from 45's to 50's? I find i feel alot of the bumps on the roads, so was wondering if going up to 50's would east that a little? Would this cause any problems with my speedo? thanks in advance edit, oh i looked on this site. - http://www.etyres.co.uk/tyre-size-calculator Scroll down, it checks the difference between the two sizes. In this case, it says "Difference in diameter: 3.52% Actual diameter change: 22mm" and "We recommend a MAXIMUM of +/- 2.5% difference" maybe its not such a good idea. mmmhhmmm Quote Link to comment Share on other sites More sharing options...
Gambit Posted October 16, 2014 Share Posted October 16, 2014 Should be fine with that mate just the profile that is changing, might alter the speedo a little bit but don't think be by much Quote Link to comment Share on other sites More sharing options...
tom_gr7 Posted October 16, 2014 Author Share Posted October 16, 2014 Should be fine with that mate just the profile that is changing, might alter the speedo a little bit but don't think be by much you think? hmmm, not sure whether to risk it or not. Rather play safe than sorry and potentially damage the car somehow. Quote Link to comment Share on other sites More sharing options...
Adam Posted October 16, 2014 Share Posted October 16, 2014 The car will only be damaged if you mix tyre sizes. As long as all four tyres are the same size as each other you'll be OK. Yes the speedo may be slightly out but I bet it already is anyway! 2 Quote Link to comment Share on other sites More sharing options...
Gambit Posted October 16, 2014 Share Posted October 16, 2014 Was just about to Echo Adam. :) Quote Link to comment Share on other sites More sharing options...
tom_gr7 Posted October 20, 2014 Author Share Posted October 20, 2014 Ah i see, thanks chaps. Quote Link to comment Share on other sites More sharing options...
david1972 Posted October 20, 2014 Share Posted October 20, 2014 I wouldn't Tom....if you want a deeper side profile you really need to drop down to 16s. Not sure your insurance company would be happy with the change in rolling radius, never mind your car or the long arm of the law regarding your speedo reading Sent from my iphone using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
tom_gr7 Posted October 21, 2014 Author Share Posted October 21, 2014 I wouldn't Tom....if you want a deeper side profile you really need to drop down to 16s. Not sure your insurance company would be happy with the change in rolling radius, never mind your car or the long arm of the law regarding your speedo reading Sent from my iPhone using Tapatalk thanks for the advice mate, I'll probably just go with some new tyres or something. rather be safe than sorry n all that !Removed!. 1 Quote Link to comment Share on other sites More sharing options...
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