Thanks a lot for those hints.

bumpier... it's a reality for low profile tires.

I was just thinking about this coz before i switched my 730i's 15" to 18" thus front caster lines suspensions were also sacrificed after a while. but then again looks is better go M54!!

since james gave me a clear picture of SUV's modding on 20" then i'll give it a go BTW.. Nice ride man..

my unending worries would be rough roads
Thanks again to all...