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Burt · 08-25-2019, 11:16 PM

On the early Miatas, the widest "street" tire available is a 245/40r15. Tires in that size have been tested on autox and road courses with various width wheels, and the wheel they were the fastest on was a 15x10. Not best for looks, just in terms of performance. The ratio of wheel width to tire width can vary a lot depending on your goal. Plus as OP stated, GM used an even wider wheel with the same size tire.

08-25-2019, 11:16 PM	#14
Burt Cone Killer Drives: 2012 SS Join Date: Dec 2013 Location: St. Albans, West Virginia Posts: 832	On the early Miatas, the widest "street" tire available is a 245/40r15. Tires in that size have been tested on autox and road courses with various width wheels, and the wheel they were the fastest on was a 15x10. Not best for looks, just in terms of performance. The ratio of wheel width to tire width can vary a lot depending on your goal. Plus as OP stated, GM used an even wider wheel with the same size tire. __________________ 2012 Camaro SS - Sold Selling off my remaining wheels, tires, 27mm front sway bar, and MGW shift knob. Get them out of my house before my wife puts me out!