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df.dima · 01-25-2013, 09:05 PM

Simply going to 18s would not "close the gap", it depends on the tire size you choose. I personally like this calculator: http://www.miata.net/garage/tirecalc.html

Taller tires will "close the gap", but will throw the speedo off as well. The size you mention is almost 1" taller (actually 245/35 would be closer to stock height), so with Pro kit, you will close the gap a bit by 1" +0.5" (half of total tire size increase). I think it's a bit too much of a difference in tire size.

01-25-2013, 09:05 PM	#2
df.dima Senior Member Join Date: May 2012 Drives: FR-S and Mazda 3 Sky Location: Kitchener, ON Posts: 343 Thanks: 10 Thanked 132 Times in 93 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Simply going to 18s would not "close the gap", it depends on the tire size you choose. I personally like this calculator: http://www.miata.net/garage/tirecalc.html Taller tires will "close the gap", but will throw the speedo off as well. The size you mention is almost 1" taller (actually 245/35 would be closer to stock height), so with Pro kit, you will close the gap a bit by 1" +0.5" (half of total tire size increase). I think it's a bit too much of a difference in tire size. Last edited by df.dima; 01-25-2013 at 10:11 PM.