Tire size question?

[wrightc21]

I am currently running a 225/40/18 tires right now, on a stock sport suspension(99 a4 Quattro). I found a very good deal on a tires however the size is 225/45/18, I looked at the tire calculator and noticed they are .5 inches difference for width. I was wondering if anyone was running these tires and if you are rubbing. I have searched however came up with nothing useful.

Thank you,
Chris

[ryannorthcott]

you wouldn't rub most likely, but it's not good for the quattro system and the speed sensor to put on different size tires. rule of thumb is that for a new tire size to be appropriate they should be less than 2% different in size from OEM