[tturbonegro]

Currently have 255 40 19 rear and 235 45 19 front Pirrellis..

What other tire set ups have you successfully (no rubbing or fitment issues) ran on an X3 ?
Does it differ with the sport suspension and 19's opposed to a non sport suspension ?

Can I run a 255 45 rear and 235 50 front ? Sport suspension seems a little rough, maybe adding a little sidewall will help the ride a little bit and sit a tinny higher all around ?

Any input appreciated...

[Bora20]

Get smoother roads...drive faster...switch to 17" tires

All of those will provide you with a smoother ride. Swapping to a 50 series tire vs. a 45 series tire will grant you 5% more sidewall, which on a 235 section width tire is 11.75 cm instead of 10.58 cm. I don't think that the extra 8mm of sidewall will make much of a difference.

[tturbonegro]

I know it's not going to make the world of a difference...I live in NJ and I've had several cars and several sets of wheels with as small as 30 or 35 series tires
Just seeing if going a little bigger is possible without rubbing...

Personally I think a 3 or 4" lift and some 33" tires would look amazing on it..but with not a vast amount of company's making parts its not so simple or cheap to do..

[Bora20]

Hartge makes parts to lift it and put on bigger tires. The look is questionable at best...

[Hoady02]

Bora is right about wheel sizes. The 17" is a really good balance between comfort and performance. You can even track an X3 without problems with 17" wheels. Ask me how I know