|
|
SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS! |
Post Reply |
|
Thread Tools | Search this Thread |
11-13-2012, 01:37 PM | #23 |
Captain
30
Rep 740
Posts |
Yeah you're going to need some camber up front to fit the 265. I'm running Eibach/Bilstein suspension with no aftermarket camber plates, and have a 245 Michelin PSS up front and when I did the skid pad exercise at the car control clinic it was rubbing like crazy. Most other driving it was fine, and when I did my track day I didn't notice any rubbing but then again I was going pretty damn slow...
|
Appreciate
0
|
11-13-2012, 02:15 PM | #24 |
Lieutenant Colonel
80
Rep 1,663
Posts |
Hey Finnegan, thanks for posting this thread. It's been really helpful in my quest to find the ideal sizes/offsets. It's also making me re-think buying the TE37SLs, as they are way more expensive than the EC7s which also look fantastic.
I was curious as to why you were more concerned with the rear rubbing than the front? Naively you'd think that if the front doesn't rub with 1" more wheel, the rear shouldn't either.
__________________
Last edited by beta; 11-13-2012 at 02:50 PM.. |
Appreciate
0
|
11-13-2012, 07:16 PM | #25 |
Dog Listener
703
Rep 7,850
Posts |
Just to clarify, I wasn't worried about the wheel rubbing, rather it was tires. A 10" ET25, as a wheel, fits just fine!
Let's say we're looking at a 275/35 round shoulder tire like the PSS. On a 9.5" (tire's measured width) wheel, tread width will be about 10". On a 10" wheel, tread width will be about 10.2". What about a square shouldered tire like an RS-3 in the same size/aspect? On a 9.5" (tire's measured width) wheel, tread width will be about 10.2". On a 10" wheel, tread width will be about 10.4". Rated M Roadster is running a 10" ET25, with a 275/35 RS-3 on a lowered car, but is running a good amount of negative camber (-3 rear) to keep it from rubbing. I think there are plans to roll the rear fenders a bit and dial it back. (BTW, I think his set-up looks unbelievably good!) Contrast Rated M's setup with that of kennyfrc's stock setup that's running a 275/35 PSS on a 10" wheel. Kenny's is on a totally stock setup, no rubbing, no tweaks. (BTW, that's another very good looking setup). Section width (sidewall meaty part of the tire) is the same on the RS-3 and the PSS. But not tread width. And wheel size and the tire's measured rim size affect the tread width (~2/10" for each .5" rim increment). That's why a PSS works on the 10" wheel pretty easily, whereas a more square shouldered tire might not work without some adjustments (it will work but there is some tweaking to do). The other thing about the increase of 1" on wheels is that the space on the front wheel well is more generous, relatively speaking, since the rear starts off at 9", and already uses a chunk of real estate. At least that's my read on the amount of available room. So the 1" change is a bigger one, relatively speaking, given the available real estate. Bottom line, there are a lot of variables involved in fitment, as I've learned on this journey (still learning): Tire's measured rim size Wheel width (and impact to tire's measured size) Offsets Lowering Camber (and how camber is achieved, plates vs. shims vs. lowering or a combo) Perch location |
Appreciate
0
|
11-13-2012, 09:58 PM | #26 | ||
Brigadier General
460
Rep 4,531
Posts |
Quote:
I completely agree with the 9.5" wheel. I completely forgot about the extra tread that is added with the increase wheel width. Even though I may screw myself over with a SCCA class (even though that may change with the letter I wrote) the car will be MUCH more fun to drive on the track and auto-x with a square set-up and massive camber I was thinking ET 35 upfront and ET 22 in the rear. Should be enough with extra camber (i'm hopping I don't have to go adjustable control arms in the rear). Does anyone know if 17" Wheels will fit? The only problem is that I'll be forced to run staggered Quote:
|
||
Appreciate
0
|
11-14-2012, 11:20 AM | #27 | ||
Dog Listener
703
Rep 7,850
Posts |
No problem. I posted in the "wheels" section rather than photos section because I thought there might be some technical discussion around fitment. Keep "derailing" as needed!
Quote:
Quote:
Colakitty is running 17s (but 10.5 rear). I wonder if there are any concerns with the larger sidewall, flex, and tire movement? Sidewall design, and rim width would help manage this though. Thanks. Yes, lots of variables. But worth thinking through, along with objectives and needs, to get the best fit and performance. |
||
Appreciate
0
|
11-14-2012, 11:51 AM | #28 | ||||||
Brigadier General
460
Rep 4,531
Posts |
Quote:
Quote:
Quote:
Quote:
I'm speculating that our car will get classed into STU, which means the mods I have planned will fit perfectly. Does it mean I'm going to be competitive? Eh we'll see. It sure beats trying to be fast with no camber in RTR. Either way though, coilovers and a square set-up are coming. I'd rather have a fun and fast car that may do so-so in PAX versus a car that I just have to deal with. There was no mention of my letter # in the November fastrack, so look for it in December! (If you want to write a letter explaining the same thing it will help the cause ) Quote:
Only reason I'd get 17s is the shed weight. Since they don't have 9.5" front and rear, I'm going to stick with 18s. Quote:
Last edited by Kgolf31; 11-14-2012 at 11:56 AM.. |
||||||
Appreciate
0
|
Post Reply |
Bookmarks |
|
|