Ride quality trade off between 18's, 19's and 20's

[JoshGM]

Originally Posted by London Lad

IMHO 18 are perfect for an e70, maybe 19s if you do a lot of fast motorway or autobahn work but bigger that that is just for bling.

Lets do this what do you look for in a car when buying?! Comfort? Performance/Power?, Speed? Safety?

Its then unfortunate for me because I even rank Comfort below Speed/Performance/Power!... So If you are buying a car with FULL SPORT PACKAGE then you should know that the vehicle is SPORT biased and not something for transforting Queen Elizabeth the 40th between her homes! So should we get surprised why Sports Version come with low profile tires 20"? I really dont think its for bling, unless individual pimping up.

In sports cars stability is paramont important, so Bavalian Engineers (and other car engineers) need to bring the centre of gravity a bit lower (look at Formula 1 Cars!) to reduce/avoid overturning moment when cornering. Besides a wider tire base has more traction surface hence gripping the road/ race track more than a bicycle tire can do (again look at F1 Cars!) ... this also helps in easy transmission of power from the power plant (V8) straight to the road, so its not for bling that some cars come with 18" wheels while "confused engineers" put 20" wheels to others!