MINI2

drb5 · Feb 4th, 2008, 06:34 AM

Found this very handy wee tool, for calculating tyre size/rolling radius...

Tire size calculator

For 18's it shows 215/40 is better than 215/35, when using 195/55r16 as the stock item.

For using 205/45r17 as stock, 205/40r18 is best.

Dunno why it would change from 16 to 17.

MINIAC · Feb 4th, 2008, 04:03 PM

That link is contained in the following FAQ:

What should be considered in choosing a wheel and tire package?

It's the diameter of the tire that matters. The variance in diameters between the smallest OEM tire (175/65-15) and largest (205/40-18) is 2.1%. The greater the diameter of the tire the more you have to worry about rubbing.

Feb 4th, 2008, 06:34 AM	#1
drb5 Cooper S owner!! My Classifieds Join Date: Oct 2007 Local Time: 02:06 PM Posts: 139 Offline	Changing tyre size? Have a look here... Found this very handy wee tool, for calculating tyre size/rolling radius... Tire size calculator For 18's it shows 215/40 is better than 215/35, when using 195/55r16 as the stock item. For using 205/45r17 as stock, 205/40r18 is best. Dunno why it would change from 16 to 17. New Cooper S is here! Last edited by drb5 : Feb 4th, 2008 at 07:38 AM.

Feb 4th, 2008, 04:03 PM	#2 (permalink)
MINIAC MINI Profiler Join Date: Feb 2001 Location: City By The Bay Local Time: 06:06 AM Posts: 8,510 Offline	That link is contained in the following FAQ: What should be considered in choosing a wheel and tire package? It's the diameter of the tire that matters. The variance in diameters between the smallest OEM tire (175/65-15) and largest (205/40-18) is 2.1%. The greater the diameter of the tire the more you have to worry about rubbing.

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