I'm about to pick up a set of 18's or 19's for my car but I have concerns about my turning radius. The 5th gen already has a crappy turning radius and having 18's or 19's won't make it any better.

To those with 18's or 19's, are you making a lot of 3 point U turns?

 

i have a question, how would getin 19s effect turnin radius? after all,i hope your gettin tire sizes that add up to the same diameter as your 17s with the 225/50/17...

 

there was another thread here that was taling about how larger tire sizes would make for a larger turning radius. Paul S. said that with his 16's he measured a smaller turning radius vs 17's.

 

check out this web site so you can see how changing your wheel size effects the speedometer
http://www.miata.net/garage/tirecalc.html

 

It makes no difference in turning radius in 16, 17 18 ect. dia. wheels, providing the aspect ratio for the tire is changed accordingly. The circumfrunce should stay the same.
These cars turn like motor homes, don't they!
My 89 SE turned much tighter - 15" wheels probably helped.

 

 

I have 18"x8" wheels with 245/40-18 tires and I do have a problem with u-turns at all.

 

You just have to get a good feel of how much room you need and take your chances. Yup, the turning radius is pretty bad.