Hey guys. So I'm replacing my stock SS/SC tires (215/45/18). I'm going with a set of KDW's but torn if I should go 40 or 45 for height. I'm currently stock suspension but have a set of Progress springs I'm going to be putting in. It only lowers it 1" in the front and 2" in the back so my car won't be slammed. Post some pics to help make my decision!

 

40 for sure. 45 would be pretty big and throw your speedo off pretty good

 

Actually 45's throw the speedo off less.

215/45-18- Going 60mph

225/40-18- Speedo reads 61.2mph
Speedometer difference- 2.117% too fast
Diameter difference- 2.07%

225/45-18- Speedo reads 59.1mph
Speedometer difference- 1.398% too slow
Diameter difference- 1.39%

 

My vote is stick with the stock size or step up to the 225/45-18. The 225/40-18 is supposed to be on a 7.5" rim at the minimum. I have seen one ss/sc in person with the 225/40-18 it looked like the tire didn't fit the rim. Just saying. Also the SC has a 4.05 final drive which is already geared low so the taller tire won't hurt your acceleration too much. I think it drops to a 3.9 final drive with the 225/45-18. You can also get your speedo recalibrated if this is a concern.

 

Well i'm going TVS so I need wider rubber. But lots of people run 40's on the SC rim. Way more than 45's that I've seen. But that's something to take into consideration!

 

I've been running 225/45/18 for about 2 years now, mind you im on stock suspension, never had an issue whatsoever, it seems that it fills the fender better than 40's do

 

Can ya shoot up a pic?

 

Go ***** deep.
235/40



Post #4000.

 

yup 235/40/18 is the way to go

 

I had 225/45s on my car at stock height for about a week...They rubbed. They were vredestein ultrac sessanta's

 

You are lowered too aren't you Fry? Any rubbing?

 

Really? I run 255/60-16 drag radials at the track that don't rub unless i'm fully locked turning.

 

225/40/18

On Sportlines

 

im on pedders with 235/40/18 no issues

 

Looks great!



Got any pics? Your tires don't bulge like crazy? 235/40 would be the closest thing there is to 215/45 diameter wise.

 

As long as you are just cruising around the street the 225/40 should be ok. I wouldn't trust it at 150 mph but who knows. I bet it doesn't corner as good as the 215/45 or a 225/45.

 

not really the bluge a little

going out to the garage in a few will post them up soon

 

You won't regret 235/40s!

You saw the pics, they don't bulge at all.

 

Moar pics?

 

I got 225/40/18's for my summer tires. they don't rub and I'm lowered on sportlines

 

Same here, but i have 215's

 

Here's the pic, for your refference, btw 225/45/18 never rubbed, 245/45/18 fit on the front with no rubbing with a 3mm spacer and fit fine in the back, 235/45/18 will fit without any problems all around...Ask me how I know lol...keep in mind I Haz Stock Suspension

 

With that tire maybe, but not all tires fit the same.

 

Ya that's my concern.

 

sorry for the huge pics but heres mine on 225/40/18s. throws the speedo off by like 1-2 mph by the tme ur gong like 40