Pilot SS size options

[sting808]

Need a sanity check before I spend $ on Pilot SS. Ordering mid Feb when 295s are produced. I'm currently running 275/40 & 315/35 NT05 on 20x10(Fr) & 20x11.5(Rr). The sidewall fitment/stretch and overall diameter with Invos and NT05s Fr/Rr were close.

Considering Pilot SS 275/295 or 285/295. (295/35R20 105Y Ferrari #09045)
295/35R20 Ferarri are 11.9" section & 12.0" tread on 10.5" rims.
Add the 1" for my 20x11.5 and it comes close the the 315s in section and tread. I'm debating on the front size. 275 or 285. 275s are 0.5" shorter in DIA, but may match up better in sidewall stretch with the 295s.

Anyone have sidewall pics of the SS in 275/35R20, 285/35R20 and 295/35R20? (and rim size) The Toyo R888 285/35 on 20x10 have a standard squared tire sidewall profile. Not stretched or bulging and sized for 10" rims. Mainly considering looks since they are only for street and occasional Auto-X when wet. Trying to avoid a front squared look and the rears that look stretched. Manufacturer tire specs may be a little misleading when mounted on wheels.

Below are the 275/40 & 315/35 NT05 on 20x10 & 20x11.5

[jgalewsk]

I have stock 1LE wheels (20x10 front, 20x11 rear) and Michelin Pilot Super Sport tires (275/35 front, 295/35 105Y rear). I would suggest going with 285 front and 295 rear if you are lowered. If you are stock height, you could fit 315 Super Sports out back without rubbing...

Here are pics of my setup:

[sting808]

Thanks for the pics. I'm lowered ~1" and running -1.0* rear camber. My Nitto 315 barely clear the liner under suspension load. The SS 315s would probably rub, especially when suspension compresses.

Curious, you run the 275/295, but suggest 285/295? The 275/295 sidewall profile matches pretty well. (besides the 0.5" DIA difference)

I tried to extrapolate the tire stretch between 295 and 275/285 based on Tirerack's spec on 10" & 11.5" wheels. The 285s on paper seems to suggest a better match, but those 275s look good. Can't trust advertised specs. Good example is Nitto vs Michelin.

[So Cal Camaro]

I run the 285/35's front and 295/35's rear, front's are 10", rear are 11" wheels, I think they are a good match, almost squared up and I use the widest Ferrari configuration, so the 12" tread...although since I need some more 295's, ordering the new Porsche configuration that is 11.9"....

[sting808]

Originally Posted by So Cal Camaro

I run the 285/35's front and 295/35's rear, front's are 10", rear are 11" wheels, I think they are a good match, almost squared up and I use the widest Ferrari configuration, so the 12" tread...although since I need some more 295's, ordering the new Porsche configuration that is 11.9"....

Tirerack didn't cite 11.9" for the Porsche 105Y, but good to know. I've been told the Ferrari 105Y (#9045) should be in production in Feb and available mid to end of Feb, so I have time to decide.

Damn, going back and forth between 275 & 285. At +$330/tire, I'll need to live with them for awhile as DD and only track them when raining. I barely drive the car 200 miles/month when my workplace became closer to home.

Especially since I got my dedicated autox set recently. Too bad no one makes race radials in 20". I would drive them to events on sunny days...

[BC 2010]

Originally Posted by So Cal Camaro

I run the 285/35's front and 295/35's rear, front's are 10", rear are 11" wheels, I think they are a good match, almost squared up and I use the widest Ferrari configuration, so the 12" tread...although since I need some more 295's, ordering the new Porsche configuration that is 11.9"....

ARE YOU USING 19" WHEELS

[EarlyApex]

Originally Posted by jgalewsk

I have stock 1LE wheels (20x10 front, 20x11 rear) and Michelin Pilot Super Sport tires (275/35 front, 295/35 105Y rear). I would suggest going with 285 front and 295 rear if you are lowered. If you are stock height, you could fit 315 Super Sports out back without rubbing...

Here are pics of my setup:

Attachment 595536

Attachment 595537

Attachment 595538

Attachment 595539

First off your car is gorgeous in those pictures.

I have a couple of questions.

Why did you go with the 275 size in the front?

What lowering springs did you use? The stance is perfect!

Did the lowering springs adversely affect the handling or just be a neutral change. I hope I can lower my 1LE without a negative affect to the handling as I do plan on doing track days this summer.

[jgalewsk]

Originally Posted by sting808

Thanks for the pics. I'm lowered ~1" and running -1.0* rear camber. My Nitto 315 barely clear the liner under suspension load. The SS 315s would probably rub, especially when suspension compresses.

Curious, you run the 275/295, but suggest 285/295? The 275/295 sidewall profile matches pretty well. (besides the 0.5" DIA difference)

I tried to extrapolate the tire stretch between 295 and 275/285 based on Tirerack's spec on 10" & 11.5" wheels. The 285s on paper seems to suggest a better match, but those 275s look good. Can't trust advertised specs. Good example is Nitto vs Michelin.

The 275 works well with that setup because the car is lowered so much in those pics. It's lowered on BC coilovers and the drop is around 2-2.25". Ride heights measured from the bottom wheel lip to fender (20" wheels) was 640mm front and 645mm rear. I was afraid the 285 might be too wide when lowered that much without having extreme camber settings. I didn't want the suspension to compress and the tire hit the fender in a corner...

But if you are only lowered around 1", I would suggest So Cal's setup with the 285 in front.

And you are just like me when it comes to researching tire setups. I look at section and tread width (and keep track of the changes between rim sizes) along with diameter to make sure everything matches up right. Tire stretch for the Super Sports match with the 275/295 setup, but the 285 will get you a little closer in diameter difference, give you some more traction up front, and give you a more square setup.

[jgalewsk]

Originally Posted by BC 2010

ARE YOU USING 19" WHEELS

So Cal's wheels are 20". Earlier post about his setup:

http://www.camaro5.com/forums/showpo...28&postcount=5

[jgalewsk]

Originally Posted by EarlyApex

First off your car is gorgeous in those pictures.

I have a couple of questions.

Why did you go with the 275 size in the front?

What lowering springs did you use? The stance is perfect!

Did the lowering springs adversely affect the handling or just be a neutral change. I hope I can lower my 1LE without a negative affect to the handling as I do plan on doing track days this summer.

Thank you very much.

Refer to the first paragraph in Post #8 as to why I chose 275's for the front. I might try 285's later but I didn't want to have rubbing issues on the first try.

Also refer to that first paragraph in Post #8 for the lowering setup. And I completely agree. The stance is absolutely perfect. I wouldn't want it any other way.

I did have Pfadt lowering springs before the BC Coilovers and there were not any adverse effects on handling. The ride was just a tad stiffer over normal size bumps, and large dips were a little harsher. Body roll was much less which helped a good bit. When I switched to the coilovers, everything changed. Ride was more controlled but stiffer (can change the dampening though). I felt much more confident in turns and what the car could do. The Michelin Super Sport tires should take a lot of credit on handling also. They are soooooooooooooooooo much better than the stock Goodyears or Pirellis.

[sting808]

Originally Posted by jgalewsk

...Tire stretch for the Super Sports match with the 275/295 setup, but the 285 will get you a little closer in diameter difference, give you some more traction up front, and give you a more square setup.

This is exactly what I've been debating. Especially since my rear 11.5" wheels will make it look "slightly" more stretched, 1/4" per side. Worked out the numbers, but pictures tell a thousand words. Your setup looks great from the pictures. So Cal's front sidewall doesn't look that squared of a profile as compared to my toyo R888 285/35. I need to take meds for my AR & OCD... or drink.

Probably more pros than cons to do 285/295. The front fender/tire gap is already slightly larger than the rear based on the body dimensions. If I don't track the set in rain as often, they should last at least 2-3 years. So whatever I decide, it's a keeper for awhile. I'll probably replace my r-comps yearly. That sucks, cost wise. Pay to play...

[sting808]

Originally Posted by jgalewsk

Thank you very much.

Refer to the first paragraph in Post #8 as to why I chose 275's for the front. I might try 285's later but I didn't want to have rubbing issues on the first try.

Also refer to that first paragraph in Post #8 for the lowering setup. And I completely agree. The stance is absolutely perfect. I wouldn't want it any other way.

I did have Pfadt lowering springs before the BC Coilovers and there were not any adverse effects on handling. The ride was just a tad stiffer over normal size bumps, and large dips were a little harsher. Body roll was much less which helped a good bit. When I switched to the coilovers, everything changed. Ride was more controlled but stiffer (can change the dampening though). I felt much more confident in turns and what the car could do. The Michelin Super Sport tires should take a lot of credit on handling also. They are soooooooooooooooooo much better than the stock Goodyears or Pirellis.

I agree, the stance looks great. If I lowered the body that much, I wouldn't be able to get out of my driveway. That's why I didn't go 19" or 18" squared with race radial's. I plan to drive to the auto-x events on them. Wife won't drive my truck and pit for me every event.

[TBone]

Sting, What's up Island brother?

As you know I have the same rims as you, CCW, in the same sizes. I am running 285 F and 315 rear. I also have coilovers and camber plates in the front but they fit before I got the camber plates. with the plates I can run 295's in the front. Jordan from JDP is running this setup. In the rear you do have to dial out some camber so they do not rub, I think I am at .5-.8ish. but they do fit in the wheel well. Any Pics you see with my CCW's on the car will be the 285/315 setup.

T.

PS. If your wife asks you what is in the bottom drawer of your dresser and you do not know, LIE and say you do. Trust me.

[sting808]

Originally Posted by TBone

Sting, What's up Island brother?

As you know I have the same rims as you, CCW, in the same sizes. I am running 285 F and 315 rear. I also have coilovers and camber plates in the front but they fit before I got the camber plates. with the plates I can run 295's in the front. Jordan from JDP is running this setup. In the rear you do have to dial out some camber so they do not rub, I think I am at .5-.8ish. but they do fit in the wheel well. Any Pics you see with my CCW's on the car will be the 285/315 setup.

T.

PS. If your wife asks you what is in the bottom drawer of your dresser and you do not know, LIE and say you do. Trust me.

TBone,

Thanks for the first-hand info. C5 is a great place to share real-world experiences, not so much vendors trying to sell stuff without validating. Need to get past the thick sales/marketing sometimes.

I see Tirerack updated the tire specs and filled-in the blanks. I don't know how the K2 315s have a 13" tread with a 12.6 section. Michelin site doesn't list tread width.

I thought Jordan was running 10.5 fronts with custom offsets and they still stuck out a little. Did the 295s look bulging on the 10s? I wonder how much camber can be dialed in and what pressures you need to run to avoid roll-over. It would be great to fit the 315s, but I can't change rear camber on the fly easily so probably leave them at -1.0* when I run my squared R888. I like the Pedders camber plates since I dial in an extra ~ -1.25* for auto-x and reset to -1.0* for street. I didn't grind my strut tower opening for extra camber adjustment so 5 hash marks is max range for me.

I was always leaning toward 285/295, with serious consideration for 275. 295/315 would be optimal, but too geared to track, than legal street. I auto-x in 2nd gear and can still light the tires when I stab the throttle. 315s and less camber would help for the power straights. But more time is there if I just drive "smart" and be patient. Tough competition in SM. However, I can imagine how those SS 315s look from the back view of your car...

BTW, we need to be more careful about mods on Oahu. Stupid +25 year old recon laws, new safety inspection standards that are inconsistently enforced, and legislators doing knee jerk reaction bills right before election year.

Latest is a new exhaust emission bill that's sooo poorly worded, it pretty much implies zero tolerance for non OE exhaust work if it makes it "louder".

The thread info has been very helpful. I just spent $ on R888s 4 months ago and told the wife I need to spend another $1500 for street tires. She didn't look too happy.