Will 18x8.0" wheels fit on a '01 Cl with comptech sport springs. If yes, any ideas on what the proper offset should be. Thanks for the help in advance.

Mike

 

Hi.

If it were me, I'd choose 235/40-18 tires and look for 18x8 wheels that had an offset of +50.

 

Thanks for the help.

 

18x8 +50 with 225/40s. Check the signature for pictures. It's a TL, but you get the idea.

 

Thanks again!!

 

u can get by on a +48 off set as well...run 225/40/18...but u can prolly go up to 235 i think....

 

Any idea if I can run with 225/45/18's to keep the rolling diameter the same with a +48 offset? Thanks

 

235/40s will give you a much closer rolling radius to stock than 225's. They should carry a higher road rating between tires of the same make as well. In fact if you're set on 8" rims I think it'd kind of a waste to get 225s, at least, I don't see any real advantage in doing so.

With 235s and a + 48 offset you definitely won't have any rubbing problems in your inside, front wheel wells and you shouldn't have any in the outer, rear wheelwells --based on all the folks running 235s on 17" SSR Competions using 45 aspect ratio tires.

 

Close, but W.R. is probably right about going with the 235/40-18s. The 235/40-18s have the closest revs/mile match (diameter) to stock.

BTW -- The load rating of a non-XL rated 225/40-18 is 88 (in general -- do check). IMO -- this is just way too low. The Toyo 225/40-18 is the only XL tire I'm aware of in that size (it has a load rating of 92W).

If you go with the 235/40-18 or 225/45-18 (and its not a Toyo T1S) you will at least have a load rating of 91...

Link to S03:

http://www.tirerack.com/tires/Spec.j...+Pole+Position

Link to tire calc:
http://www.miata.net/garage/tirecalc.html

 

Actually Nitto has an XL-Rated tire in a 225/40/18 its the 555 and its a 92W. Nitto also has a 235/40/18 in a 91W. Either size will work fine on an 8" wide wheel.

 

Look I use 17x8 50 mm offset 235/45/17

 

Eric, if you hadn't already purchased your current tire/wheel combo and were shopping right now, would you do the Toyos & SSR Comps?

 

Yes, I've seen the 235/40-18 (as 91) [not the 225/40-18 there]. Too bad they don't indicate if the tire is actually XL rated on the site. You have to guess based on the 88 that most of the 225/40-18s on Tire Rack have.

So, it does have a higher rating, but the site (this link) shows the load being supported at the max load. It is not necessarily an XL tire (or there site is as messed up [I presume it is due to the 92 vs. the 88, but…])

It would help if they put an "*" or put an XL/SL designation...

http://www.nittotire.com/tire_nt555_sizes.asp

 

YES -- now that Technique proved that lowering works without a problem -- YES, YES, YES!!!!

If there had of been a problem with some great future coilover or spring/shock (that I've not found yet) and the SSR/Toyos, I would be sticking with the Toyos, but would have gotten the Volks in 17x7.5” for the light weight and forged construction.

 

I'm in the same situation now, I'm trying to get 18x8 inch rims with a 45 offset. Tire racks says I shouldn't go with 235/40/18, but should get 225/45/18. He says because the offset is so low, I might have problems with the 235. Is that true anyone?

I kinda want the 235's of course...

 

That was the conventional wisdom, until poor H@mmerm@n found out that he rubbed with:

SSR Competition 17x8 +48 wheels
Toyo T1S 235/45ZR17-97W* tires
Comptech lowering springs

AND

KONI SHOCKS!!!!

He gets a bad rub when he does a hard lock turn. The rub is in the front.

So, there is something going on, and until someone sorts out the compressed/closed length of the KONIS vs. the stock shocks, there is some problem out there!

(He is going to try some 225/45-17 T1S proxies. You know a problem is "serious" when someone has to get some smaller tires of the same brand *and* they are not worn out...)

Be grateful you went with 17x7.5 +52 without the konis...

 

1. The offset is going to be a problem if you lower with the 235s.

2. The brands that TireRack sells have an OK load rating in the 225/45-18 and the speedo will only be off a bit.

3. The 235/40-18s have the best speedo match (and better load rating), but you would probably want to watch the amount you're lowering *and* you might get some fender rub on the inside of the rear fender lip if you combined them with some wide tires (S-03s) and the 8" rims. There are people who run it, but there are little factors that can make this a "problem". If you aren't going to lower, you will probably be ok (you will have the SUV look)...

 

Hey Eric, thanks for the advice!

I definitely don't want the SUV look, in fact the 225/45/18 will be slightly bigger in diameter so the gap will be less. Since I don't plan on lowering, then I should be fine with either case it seems. I'll see what the tire rack geniuses think...

 

I'm surprised you didn't have to "do the sign of the cross" before mentioning the CLS and 91 load rated tires (nothing like being inconsistent for TireRack sales people)


(Or send your lawyer's waiver to them...)

 

Eric, I got a reply from Koni today on the uncompressed/compressed length question:

"...Mike, the min and max length for the shocks is

Front: 484mm max, 347mm min
Rear: 642mm max, 425mm min

Note that this will only help you a little in lowering the car. Typically, 1.5-1.75" max is recommend for lowering the vehicle as any more tend to make the car bottom too often. Also, check the distance before you hit the bump stop. If you have any other questions, please let me know. Thanks, Gordon..."

Hope that helps someone down the road! Meanwhile, I am replacing the 235-45/17 Toyo's with 225-45/17's Thursday.

 

Now, where to get the stock data (time to open the Helms...):

for the front -> 19.06" extended and 13.66 compressed

That means the max stroke is 19.06-13.66 = 5.4"!

boy, I though we had more than 5 inches of suspension travel...

Anyone got the stock shocks out with a good ruler around?