GavinL Posted June 17, 2002 Share Posted June 17, 2002 Hi... I am looking too upgrade my skinny 255 rears too 17/40/275...anyone got 275 installed and if so what make. thanks... Quote Link to comment Share on other sites More sharing options...
AJI Posted June 17, 2002 Share Posted June 17, 2002 275 width is an unsual tyre size and only a few companies produce them. I currently have 275 width Dunlop SP9000's on the rear but will soon be upgrading to 285 width tyres which is a more common size as these are standard widths for Porsches. Quote Link to comment Share on other sites More sharing options...
eyefi Posted June 17, 2002 Share Posted June 17, 2002 gav / aji, what size rims r u putting them size tyres on & what profile? Quote Link to comment Share on other sites More sharing options...
GavinL Posted June 18, 2002 Author Share Posted June 18, 2002 Originally posted by eyefi gav / aji, what size rims r u putting them size tyres on & what profile? Hi... I have the stock 17" wheels on my car. I have just ordered a set of PP SO2's, 235 front and 275 rears from Micheldever. Their stocks of the older SO2 are nearly gone, be quick if you want any. Quote Link to comment Share on other sites More sharing options...
GavinL Posted June 19, 2002 Author Share Posted June 19, 2002 What pressures are people running on 275 tyres? thanks Quote Link to comment Share on other sites More sharing options...
Terminator Posted June 19, 2002 Share Posted June 19, 2002 What profile will you run on 17's with 275? Quote Link to comment Share on other sites More sharing options...
GavinL Posted June 19, 2002 Author Share Posted June 19, 2002 What pressures are people running on 275 tyres? thanks Quote Link to comment Share on other sites More sharing options...
AJI Posted June 19, 2002 Share Posted June 19, 2002 The 275 width that I have at the moment are on the stock 17" x 9.5 rims. The 285 width tyres that I will soon have on order will be going onto 18" x 10 rims. As for tyre pressures, the rears are at 36psi. Rear tyres on now are 275/40/17. Rear tyres to be on order are 285/35/18, I have been told that you have to drop a profile if you increase diameter in order to keep rolling radius more or less as it used to be. Quote Link to comment Share on other sites More sharing options...
Alex Posted June 19, 2002 Share Posted June 19, 2002 I have some 285.35.18's sitting here doing nothing...no car to run them either soon!!! Dunlop SP9000 Quote Link to comment Share on other sites More sharing options...
GavinL Posted June 19, 2002 Author Share Posted June 19, 2002 Originally posted by Terminator What profile will you run on 17's with 275? If you mean me then 40's Quote Link to comment Share on other sites More sharing options...
Terminator Posted June 23, 2002 Share Posted June 23, 2002 Thanks Gavin, sorry it was not clear that I was referring to your post. Quote Link to comment Share on other sites More sharing options...
GavinL Posted June 23, 2002 Author Share Posted June 23, 2002 Originally posted by Terminator Thanks Gavin, sorry it was not clear that I was referring to your post. |'m sure that 275 affect the rolling raduis, is that right and how much speedo error should I account for. Thanks Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted June 23, 2002 Share Posted June 23, 2002 Originally posted by GavinL |'m sure that 275 affect the rolling raduis, is that right and how much speedo error should I account for. Thanks http://www.fernblatt.com/longhurst/tyre_bible.html Have a look about 2/3rd the way down, they've got a full calculator that explains it all. Quote Link to comment Share on other sites More sharing options...
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