I had 235 40 r17 on my 320 when i bought it second hand. took it to the local fitters for new rubbers and found the fronts were split badly on the inner side walls (tyres were bf goodridge). Spoke to the guys there and they all said the same thing, 235 is just too large. The cross pressure of turning, especially hard, caused the sidewalls to expand hitting the suspension and rubbing through. 225 is the maximum you should put on the front.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.