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[minicabrio]

Quote: Originally Posted by JohnWB (original)

Using you own figures, the difference between the standard MINI 17 inch tyre & the 215/45 is 1.46%, whereas the diference for the 215/40 is 2.03% which is further away form the optimal size as detrmined by MINI
The difference is not very much but the lower sidewall hight tends to give a stiffer ride and slightly less roll
Both sizes are much better than the runflats and the majority of people have tended to go for the 215

Using the stats from MINI2.... available here:

73 people have changed to 215/40 R17 non-runflats

70 people have changed to 215/45 R17 non-runflats

Both much better than standard