relentless Posted July 31, 2008 Share Posted July 31, 2008 Is it wise to replace a 235/50/17 with a 225/50/17? (rears on my JDM) Would this cause problems? 225's are more readily available and cheaper! Quote Link to comment Share on other sites More sharing options...
Digsy Posted July 31, 2008 Share Posted July 31, 2008 I wouldn't really endorse putting smaller tyres on the back of a powerful rear engined car... Quote Link to comment Share on other sites More sharing options...
relentless Posted July 31, 2008 Author Share Posted July 31, 2008 how about 245's - will they fit? Quote Link to comment Share on other sites More sharing options...
Digsy Posted July 31, 2008 Share Posted July 31, 2008 how about 245's - will they fit? Do you know how wide your rims are? Quote Link to comment Share on other sites More sharing options...
relentless Posted July 31, 2008 Author Share Posted July 31, 2008 I believe that they are 7.50" front 8.00" rear (according to Lomoto) Quote Link to comment Share on other sites More sharing options...
Digsy Posted July 31, 2008 Share Posted July 31, 2008 245/50 will fit then and although you have changed the rolling radius a bit I wouldn't expect there to be any traction control/stability issues. However, I'm not an expert and I'd get a second opinion from someone like Big Phil or Adam @ Z1. Quote Link to comment Share on other sites More sharing options...
bigphil Posted July 31, 2008 Share Posted July 31, 2008 245/50 will fit fine but at a true 70mph your speedo will read 71.05 Quote Link to comment Share on other sites More sharing options...
max Posted July 31, 2008 Share Posted July 31, 2008 If he is only changing the width and not the diameter why would the speedo reading change 235/50/17 to 245/50/17. Max. Quote Link to comment Share on other sites More sharing options...
Sarnie Posted July 31, 2008 Share Posted July 31, 2008 If he is only changing the width and not the diameter why would the speedo reading change 235/50/17 to 245/50/17.Max. +1 Quote Link to comment Share on other sites More sharing options...
bigphil Posted July 31, 2008 Share Posted July 31, 2008 If he is only changing the width and not the diameter why would the speedo reading change 235/50/17 to 245/50/17.Max. because the relative percentage between side profile and tread width alters the rolling radius therefore adjusting the gearing and ultimately the speedo reading, in this case not by any significant amount. Quote Link to comment Share on other sites More sharing options...
GIXXERUK Posted July 31, 2008 Share Posted July 31, 2008 the profile of a tyre is proportional to the width of tyre Quote Link to comment Share on other sites More sharing options...
Stew Posted August 1, 2008 Share Posted August 1, 2008 50% of 245 is more than 50% of 235! Simple. Quote Link to comment Share on other sites More sharing options...
Digsy Posted August 1, 2008 Share Posted August 1, 2008 50% of 245 is more than 50% of 235! Simple. We have to remember that Mark and Liam aren't as bright as us, Stew. Quote Link to comment Share on other sites More sharing options...
Chris`I Posted August 1, 2008 Share Posted August 1, 2008 50% of 245 is more than 50% of 235! Simple. We have to remember that Mark and Liam aren't as bright as us, Stew. Lol - I would hope Liam is otherwise I aint going to him when its time to remortgage Quote Link to comment Share on other sites More sharing options...
Zummertor Posted August 1, 2008 Share Posted August 1, 2008 50% of 245 is more than 50% of 235! Simple. We have to remember that Mark and Liam aren't as bright as us, Stew. Lol - I would hope Liam is otherwise I aint going to him when its time to remortgage Of course he is, how do you think he lined his pockets to have that Lambo ? Quote Link to comment Share on other sites More sharing options...
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