My wife's '07 X3 currently has 235 50 18 all season tires but I'm looking to get some snow tires. I found a used set of 235 55 18 for sale locally and I'm wondering if I'll have any problems with the slightly larger tire. It seems the difference is .9 inches.

 

As long as you change all 4 to the same size, they'll fit.

 

Actually, those tires only have a 5mm taller sidewall, which is about .2"
As long as you go taller all on all four corners the slight increased circumference shouldnt cause a traction control issue

 

Yep, plan would be to use the slightly taller tires on all four wheels.

Thanks.