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01FR500 · 05-06-2008, 08:40 PM

There is going to be a difference in diameter, circumference, and side wall with thoes sizes. If you can get a 255-40 tire that will make it almost identical.

http://www.miata.net/garage/tirecalcold.html

That should help you figure out what you need. But they will look about the same.

05-06-2008, 08:40 PM	#3 (permalink)
01FR500 Cones Beware Join Date: Sep 2006 Location: Texarkana, TX/Conway, AR Posts: 673	There is going to be a difference in diameter, circumference, and side wall with thoes sizes. If you can get a 255-40 tire that will make it almost identical. http://www.miata.net/garage/tirecalcold.html That should help you figure out what you need. But they will look about the same. __________________ 2003 GT H&R SuperSports l Tokico Illumina dampers l Maximum Motorsports c/c plates l MM XL SFCs l JLT RAI l MGW shifter l other goodies...