CLSilk

So I just lowered my '03 CLS (auto) via eibach pro dampers and tanabe nf210 springs. I know.... I know...... coilovers would of been a better choice but for my situation I felt this was a decent setup for my priorities...... Long story short. I'm going to get a set of new shoes and I'm wondering what the differences in ride quality, if any are between 225/40/18 and 235/40/18? I know some have said the "235" will allow the speedometer to better read??? I have read alot of the posts in here already but my main question is ride quality? Rim of choice is enkei rpf1, 18x8. I'm only lowered 1 inch in the front and about half to 3/4 in the rear. Thanks in advance.

CLSilk

I have took the time to read all that I can on here so please have some patience. I'm just looking for some current advice from members with their wheel and tire setup(s). Thanks.

aznboi2424

iTrader: (10)

I'm running 235/40/18 for the reason to keep the speedometer accurate. This is the size that will keep it the most accurate.
Never ran 225/40/18 but compared to 235s, the ride on the 225 will be harsher because the sidewall is shorter. You will also lose some traction because of the narrower tire. But I think the tire prices are better for 225s. To me, it wasn't worth it, 235 all the way.

GroundedCustom

Depends on width of rim. On 8" go 235 for sure. On my stocks i run 235/45/17

CLSilk

Thanks guys!

gnuts

iTrader: (1)

I'm running 18x8 RPF1 with 235.

Oldsman71

iTrader: (1)

Any rubbing issues with the 18x8 +45 offset and 235/40/18 tires? My car is sitting down about 1" in front and 3/4" in back (from stock) with H&R OE sports and bilsteins. I never had any problems with the 225/45/18 on 18x7.5 +53. I was even wondering if 245/40/18s would fit without being a problem. I do not have rolled fenders or a camber kit.

brian6speed

iTrader: (5)

I would think you could run 235 or 245 and be fine. Your current wheels have 13mm more inner clearance and 1 mm less outer clearance than my SSR wheels that are 18x8.5 +52 that I run 255 tires on.

Stephen00TL

I have h&r sport springs and koni yellows with 18x8 +45 aspecs. I run Michelin pilot super sports in 235-40-18 and when I rub occasionally. When I first put them on the back would rub any time somebody was in the back seat until I trimmed the bumper tab. The only problem I have is the front rubbing when turning and there is a dip. It rubs on the the front fender liner clips

Oldsman71

iTrader: (1)

Thanks for your responses. I Thought I was going to get a set of those 2005 18x8 A-Spec wheels on ebay. Just got a refund from seller instead. Will probably go with a 17" rpf1 or GT7. Really bummed out now.

Stephen00TL

Ordered a set also and go the refund as well.

JarrettLauderdale

Well I'm pretty sure that there's nothing wrong with RPF1s, so I'd say your squared away if you get those.

gnuts

iTrader: (1)

get 18s though. 17s will look too small.

Oldsman71

iTrader: (1)

The only silver 18x8 rpf1 that fits our cars has a +35 offset. I feel that this might stick out to far (well over an inch from stock). The 18x7.5 has a +48 offset, but its probably too narrow to run a 235 tire. Not sure what I'm going to do.

Stephen00TL

I used to run 235-40-18 on 18x7.5 aspecs.

gnuts

iTrader: (1)

I have those rims on currently with 235/40. I will rub on big dips in the rear only. I'm dropped about 1.6" around, rolled rear fenders and no camber kit. (ingalls is going on in the spring). With a 225 you might be ok.

Oldsman71

iTrader: (1)

If those are pictures of this set up, it doesn't look too bad. I thought it might "balloon" the sidewalls a little more. Tire racks specs recommend a minimum wheel width of 8" for a 235. Did you have any "funky" wear or ride issues? What did the 18X7.5 Aspecs come off of? TSX?

Stephen00TL

I never had any problem with wear or ride issues. They never really ballooned and they fit well in my opinion. The 18x7.5 aspecs were off a tsx and had a 55 offset.

Oldsman71

iTrader: (1)

Good to know this. Thank you. I'm a month or two away from having to make a firm decision. Perhaps a set of those sparkle silver Aspecs will pop up somewhere before then. If not I can still go with 18x7.5 rpf1s