Running a 275 on a 9 inch with either of the tires you have listed is not a good idea. They both have a soft sidewall that allow for a lot of sidewall flex. Not exactly something you want when your autoxing. Makes for piss poor handling. On a 9 inch rim i wouldnt go any bigger than a 255.
For instance, Mike Maier (5 time scca national autox champion) run a 265 on his 66 Mustang Coupe and thats on a 9.5 inch rim.
Running a 275 on a 9 inch with either of the tires you have listed is not a good idea. They both have a soft sidewall that allow for a lot of sidewall flex. Not exactly something you want when your autoxing. Makes for piss poor handling. On a 9 inch rim i wouldnt go any bigger than a 255.
For instance, Mike Maier (5 time scca national autox champion) run a 265 on his 66 Mustang Coupe and thats on a 9.5 inch rim.
That's a good point. If I drop to. 255 then it opens up some other tire options as well. I think the Dunlop star specs may be in my future. What I have read they are a little better for autox than the NT05's.
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
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