(I posted this in the "suspension" forum also, but it seems there are more people in here, and since it's related to an R/T I hope it's OK to re-post)


I bought the 18" Mopar wheels as seen here: Mopar Wheel

I'm trying to find the biggest tire (both wide and tall) that I can put on this rim and still fit it on my R/T without any interference. I noticed today that the standard 20" wheels with the 245/45 tires is extremely tight to the suspension components.

Anyone know what tire size might work?

Thanks.

-Dave, Seattle

p.s. I've never lowered one of my vehicles, but it seems these Challengers are ripe for doing so. They have a very high stance, and it would be nice to bring it down a little.

 

We need to know the width as well as the rim diameter. Are they 8's or 8.5's? You can only safely go so wide based on the rim width. Just a guess would be 255-55-R18's would be the biggest. You will definately have to take some measurements in the wheel well.

 

Sorry about that. They are 7 1/2" wide.

Even if I take measurements, it's hard to tell exactly what will work without throwing a wheel on. I was hoping someone else may have done some experimenting.

-Dave

 

Forget it. I just did some checking, and there aren't even that many tire options available for 18" rims. Must be why Dodge chose the 235/55s.

There are a lot more options for a 17" rim. Darn.

-Dave

 

The widith is 8.5.

 

The stock tire on the 18" package'd R/T is a 235/55/R18?

 

Yes, I believe so. I got it from the Tire Rack website which was correct about the 20" tire, so I assume they are correct about the 18. Their site is pretty cool. Lots of info, and if you are shopping for wheels, they have a link where you can see each wheel on a Challenger picture, and you can even change colors for the car. I don't like any of their wheels, but still a cool feature.

-Dave