max tyres on 17x7JJ?

[scooby_si]

what\'s the max tyre size you can go on these size wheels, i;ve put a set of 235/45ZR17 on one pair just thinking the other pair of tyres i have (255/40\'s) will be a stage too far.....
Any thoughts?
Si

[MikeLMR]

215 maximum

http://www.yokohamatire.com/utrimwidth.asp

[scooby_si]

hmm strange they had 235\'s when i got them & so far only replaced the bald set of 235\'s i shreaded.
So stupid question mode on, aside from anyone wana buy sum 255\'s http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/7/7_18_4.gif\' border=0> lol, is what/why are they the max sizes what might using bigger ones do from ahandling/risk or otherwise point of view?
Ta
Si

[MikeLMR]

basically distortion and flex in the sidewall. If you look at the chart the higher the profile of the tyre the more of a difference you can have between the tread width and rim width. This is due to the increased depth of the sidewall that can take up the difference.

Fitting a wide tyre on a narrow rim can lead to more sidewall flex and if its really missmatched I\'d guess the tyre could fail.

7" wide rims are a little narrow for a 3rd gen. The standard ones are 8" wide IIRC