Give it a second man.....it's a holiday weekend. I'll give you this....

I'm pretty sure you can't just add more side wall with out messing with the speedometer and it may have an affect on the transmission.

If you do a search on those tires, you might find some user reviews from our board. I've only run Diamaris and Bridgestones.....I also run Winter tread during the cold months. The wide tires on 19/20 oem rims are no good in the snow.

I doubt a supposedly weaker sidewall is going to have any affect on your driving....if you're not pushing it to the limits.

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2005 x5 4.4i sport