Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Wheel Directory: Axis X-Factor 18x8.5 +45

madcap · 01-10-2013, 11:16 AM

check out http://www.1010tires.com/tiresizecalculator.asp

245/35R18 is closer to stock diameter so your speedo will be a bit more accurate. Also, the difference in overall diameter between 225/40R18 and 245/35R18 is only about a quarter of an inch, so an eightth of an inch on each side of center. I don't see that making a huge difference in ride between the two.

01-10-2013, 11:16 AM	#7
madcap Member Join Date: Nov 2012 Drives: 2013 Hot Lava FR-S Location: Baton Rouge, LA Posts: 38 Thanks: 0 Thanked 16 Times in 6 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	check out http://www.1010tires.com/tiresizecalculator.asp 245/35R18 is closer to stock diameter so your speedo will be a bit more accurate. Also, the difference in overall diameter between 225/40R18 and 245/35R18 is only about a quarter of an inch, so an eightth of an inch on each side of center. I don't see that making a huge difference in ride between the two.