ir_fuel Posted November 5, 2007 Share Posted November 5, 2007 Hi I just checked with Bridgestone for wintertyres, to put on the (non rays) standard alloys. I asked for 225/45/18 and 245/45/18 they got back to me and said that they dont have the rear tyre size, and that they verified and apparently a 235/50/18 also fits and they have that. Now my question, is this ok? And secondly, arent the standard alloys themselves the same width front and back (rays are 8 and 8.5" if i am not mistaken), so maybe i can just put 225/45/18 at the back too?? help Quote Link to comment Share on other sites More sharing options...
ir_fuel Posted November 5, 2007 Author Share Posted November 5, 2007 btw, i prefer to stick to bridgestones because i have a verrry good price on them Quote Link to comment Share on other sites More sharing options...
lomoto Posted November 5, 2007 Share Posted November 5, 2007 std alloys are different widths front to rear Quote Link to comment Share on other sites More sharing options...
Gus Posted November 5, 2007 Share Posted November 5, 2007 Nope, Standard UK 18" alloys are both 8" wide, it was just the Rays that were different, ie 8 and 8.5 Gus Quote Link to comment Share on other sites More sharing options...
lomoto Posted November 5, 2007 Share Posted November 5, 2007 Nope, Standard UK 18" alloys are both 8" wide, it was just the Rays that were different, ie 8 and 8.5 Gus yep your right... Quote Link to comment Share on other sites More sharing options...
ir_fuel Posted November 5, 2007 Author Share Posted November 5, 2007 ok, so about the tyre size? Anyone? Quote Link to comment Share on other sites More sharing options...
Gus Posted November 5, 2007 Share Posted November 5, 2007 Depth of sidewall on 245/45 is 0.45 * 245mm = 110.25mm depth of sidewall on 235/50 is 0.50 * 235mm = 117.50mm Since there are two sections of tyre in the overall wheel diameter, then the 235/50 tyre diameter is 14.5mm too large Would probably cause havoc with your ESP, etc If you want to go to 50 section tyres, then should be 225/50, this would only be 4.5mm out. HTH Gus ps 224/45 would be too small, ie sidewall is only 101.25mm Quote Link to comment Share on other sites More sharing options...
ir_fuel Posted November 6, 2007 Author Share Posted November 6, 2007 And what about ESP/TC cutting in? I know its not supposed to work with wrong tyre sizes, but how does it react if you have a flat tyre and put one of those odd-sized "space-saver" wheels on temporarily? I had this on my TT and I cannot recall having had any TC problems whatsoever. Quote Link to comment Share on other sites More sharing options...
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