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Camaro Z/28 Forum - Z/28 Specific Topics Discussions related to the 5th gen Camaro Z/28 model

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Old 06-04-2014, 01:12 PM   #1
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Z/28: Let's Talk Tires!

I thought it might be time to start a single thread devoted to tire choices -- both for street/light track usage, and for dedicated track purposes. I started a discussion around tires for street and/or track usage in cool/damp weather, where the Trofeo Rs are not happy: SEE THAT HERE.

Here's my attempt at a discussion of alternative tire choices for both Street and Track usage.

STREET CONTENDERS -- ALSO FOR OCCASIONAL TRACK USE

1. Michelin Pilot Super Sports: Excellent (though ubiquitous). Kinda like the Class President in that they are good everywhere with no glaring flaws.

2. Yokohama ADVAN Neova AD08 R: a.k.a "The Dark Horse" -- which won't match the PSS in the wet but might just be the Track Champ for a street tire. Massive dry grip, which may make them well-suited to a car designed around the Trofeo R, but new enough that there are very few reviews available.
EDIT on 07/16/14: Just installed a set on my OEM wheels. Just a few miles so far, but they seem to be a good middle-ground between Trofeos and the S-04 on the street. No tramlining on irregular surfaces, very responsive feel on the street, but they are firmer (slightly harsher ride) and noisier than the S-04. Will report back after trying them under more aggressive cornering...

3. Bridgestone Potenza RE-11: Highly regarded and seem to offer good AutoX and track performance. NOTE: The RE-11A is coming soon!

4. Bridgestone Potenza S-04 Pole Position: This well-reviewed all-rounder usually finishes second to the Michelin PSS. I had to scramble to mount more street-oriented tires for a drive from TX to CA, and ended up with Bridgestone S-04 Pole Positions because the others weren't available. Wonderful on the street, but the Z/28 simply overpowers them on-track. Despite playing around with tire pressures, I could NOT get these to the point where they were anything but frustrating on-track. This was at Sears Point in moderate temperatures (highs never exceeded 80 degrees). Using a grading system based on my needs, I have to give these a FAIL.

TRACK CONTENDERS -- MAX PERFORMANCE

1. Pirelli P-Zero Trofeo R: good enough that Team Z/28 designed the car around them. Outstanding on-track, but how long will they live?

2. Michelin Pilot Sport Cup 2: Will these be close enough to the Trofeo R's on track that their longer life makes them the Holy Grail I'm looking for? Standard equipment on the SLS AMG Black Series, Porsche 918, and Ferrari 458 Speciale. Somebody needs to try these, and soon...
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Old 06-04-2014, 01:30 PM   #2
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Thank you for your work and time invested in this post.
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Old 06-04-2014, 02:01 PM   #3
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Thank you for your work and time invested in this post.
x2. This is a very impressive explanation... For what it's worth, my dad has been raving about the Pilot Super Sports he just put on his Mercedes, especially when he puts it on a track. They are definitely good in all scenarios.
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Old 06-04-2014, 02:05 PM   #4
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Also for what it's worth, I'm a Costco fan and they sell Bridgestone and Michelin.
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Old 06-04-2014, 04:14 PM   #5
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yep got my bridgestone pole position set with nitrogen at costco great price and excellent care taken.
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Old 06-04-2014, 05:58 PM   #6
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yep got my bridgestone pole position set with nitrogen at costco great price and excellent care taken.
The S-04s are fantastic on the street. I didn't like them on-track, but they made a HUGE difference in how the car felt on the street. Much more pleasurable to drive, with zero hunting and very low road noise...
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Old 06-04-2014, 07:54 PM   #7
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Speaking of Bridgestone S-04s...

I noticed, when comparing the tires mentioned above, that when you select the group and then "compare all", the Trofeo Rs have what looks like a significant tread width advantage. This is described in their product literature as well.

To be honest, I never really thought much about that until today. A long time ago I ordered a set of Trofeo Rs to have on hand when the OEM set is worn out, and today they showed up. Our garage has started to look like Crazy Ray's House of Discount Tires, so I got to work stacking tires on moving dollies.

Lo and behold, here are some shots of the S-04s -- on the right, mounted to the OEM wheels and inflated -- next to the recently arrived stack of Trofeo Rs, on the left. Yes -- the garage floor is even and the dollies are exactly the same height.







Funny thing is, when I changed out the Bridgestone S-04s for the OEM Trofeo Rs, the first thing I noticed was that they seem to stick out of the wheel wells a touch more. I attributed that to my tired state over the weekend, but I guess it's true...
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Old 06-04-2014, 08:03 PM   #8
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What the heck do all the numbers on the tire wall mean if the contact patch to the ground varies like that?
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Old 06-04-2014, 08:08 PM   #9
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What the heck do all the numbers on the tire wall mean if the contact patch to the ground varies like that?
I would like to know too.
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Old 06-04-2014, 08:23 PM   #10
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What the heck do all the numbers on the tire wall mean if the contact patch to the ground varies like that?
I do know from experience that Michelin Pilot Super Sports run notoriously wide. I agree -- dimensions should be exact and not "sweetened" in any way.

I'm not sure all of this is "cheating", at least in the case of the Trofeo Rs. They are very "square" and the sidewalls do not seem to bulge or round as much as the S-04s.

After going from memory I decided to go back to TireRack; here's a chart for comparison. Damn; guess Michelin is really stretching those Pilot Super Sports!

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Old 06-04-2014, 08:44 PM   #11
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Thanks. I note overall diameter 26.3", but blank for Trofeo.
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Old 06-04-2014, 08:50 PM   #12
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....My $.02....all those sizes are only accurate if the tire is put on the correct width of rim for which they were made....Yes, there is a "range" of rim width the tires can be put on, but the over-all diameter, tread patch, side-wall height, etc., all is different from what is specified, if not put on the "optimal" width rim....
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Old 06-04-2014, 09:23 PM   #13
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You'd have to look at them on the same rims.

DOH! I posted that over an hour ago.
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Old 06-05-2014, 10:25 AM   #14
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Here are identical 285/35-19 Michelin PS2's, one set mounted, one set unmounted.
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Old 06-28-2014, 06:36 PM   #15
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Some thoughts about tires. First, I have a set of Yokohama AD08-Rs on the way and will report back my thoughts on how I like them.

Second, here are some photos of my Pirelli Trofeo R tires after 3 track days -- one at Sears Point, and two at Thunderhill in very hot conditions. I think the Trofeo R's are wearing better than I expected; it will be interesting to see how many more laps I can get out of them...

LEFT REAR:






LEFT FRONT:






RIGHT FRONT:




RIGHT REAR:


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Old 06-29-2014, 09:24 AM   #16
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I would like to have a set of tires I could run on the street, that would't throw crap all over the rear fenders-rock chips, ect.

Suggestions for those?
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Old 06-29-2014, 09:45 AM   #17
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I would like to have a set of tires I could run on the street, that would't throw crap all over the rear fenders-rock chips, ect.

Suggestions for those?
My car is white and white is always supposed to hide dirt better but after washing her I take a speed run to dry and in 2 miles she is dirty again back on the lower door and rear fenders.

Hopefully Skylane is working on a kit to run these http://goo.gl/JvHUrj
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Old 06-29-2014, 12:20 PM   #18
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I would like to have a set of tires I could run on the street, that would't throw crap all over the rear fenders-rock chips, ect.

Suggestions for those?
See first post in thread...
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Old 06-29-2014, 04:01 PM   #19
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How do we match the TPS to the car? I have my wheels and also 4 sensors, but never made the sensor match, how is that done.
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Old 06-29-2014, 04:08 PM   #20
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My car is white and white is always supposed to hide dirt better but after washing her I take a speed run to dry and in 2 miles she is dirty again back on the lower door and rear fenders.

Hopefully Skylane is working on a kit to run these http://goo.gl/JvHUrj
We only let the guy advertise the mud guards on our site, but now are the rock guards still available? The ZL1 rock guards will work. Where do we get them?

I can get them made easy.
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Old 06-29-2014, 04:53 PM   #21
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How do we match the TPS to the car? I have my wheels and also 4 sensors, but never made the sensor match, how is that done.
1. Buy one of THESE


2. You enter the TPMS reset menu via the DIC display. You go to the TPMS display and then hit "select" to get into the reset/programming mode.

3. Once into the reset mode, and starting at the driver's side front tire, you simply go in a clockwise pattern (seen from above) to reset each TPMS. The car gives you feedback by honking when a TPMS connection has been made.
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Old 07-03-2014, 09:05 AM   #22
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even though it says it doesn't..this works on the z with the factory tpms sensors also vettes and ctsvs http://www.tirerack.com/accessories/detail.jsp?ID=177
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Old 07-03-2014, 09:17 AM   #23
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here are my tires after roughly 400 miles and 6.5hrs in some initial street miles, 1 autox and 3 DE track days. All brake pads are even at 9.34cm.
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Old 07-03-2014, 09:45 AM   #24
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How do we match the TPS to the car? I have my wheels and also 4 sensors, but never made the sensor match, how is that done.
Up to 2011, GM's did not need a tool. Now they do. I will train yours for free for just to test my tool on Z/28's.

SIDEBAR:

You don't have to buy GM sensors either, they are becoming universal. Major brands like VDO are selling sensors that are better than OEM pieces at less than half OEM dealer price. They train faster and seal better.

In fact, some cars come with rubber TPMS valve stems which are illegal for many kinds of racing; they must be metal. VDO sensors are metal. Look for SE10001HP - http://www.amazon.com/VDO-SE10001HP-...ords=SE10001HP

Half the price of TireRack or OEM.
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2013 Volt SCCA Solo2 #771 HS3.
And a bunch of Duramaxes.

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Old 07-03-2014, 09:50 AM   #25
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If you have not already maxed out the front camber I suggest doing so, you are on the sidewalls a bit. Other than that, it looks perfectly normal and expected.
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