Is there any reason somebody would prefer running a skinnier rim on 255s? Ex: 17x9 all around instead of 17x10 all around. In other words is there ever a time where sidewall flex is desired?

Is wider is always beneficial to performance, with the same size tires?

 

Up to a certain point, I would say virtually always.

Less flex, sharper turn-in, etc...

 

Wich size will have more concave and lip, 10+45, 9.5 +35 or 9.5+22..? or will they be the same..?

 

Not my car. I believe they are 17x9.5 +35 with 255s all around

 

yeah those are the 9.5 +35 all around, willywills car.

 

does 17x10 +45 at the rear require to roll the fenders?

 

Not my car, but 17x10 ET45

 

Yes, you'll at least need to roll and relocate your bumper tab.

 

anyone have any info on how much the 17 x 9.5's and 17 x 10's weigh?

 

17x9 +22 front and rear w/ 255/40/17