Goodyear Run Flats
Safety Car
Joined: Jun 2006
Posts: 3,605
Likes: 2
From: Latrobe PA
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
I'll see your 
and raise you 
http://corvetteactioncenter.com/kb/q....php?qstId=515 Take a look at para 2
"When deflated the EMTs on Vettes are rated by GM for 200 miles in 73 degrees weather at 55 mph with the car at gross weight"
As with all these things its who you believe but the article on CAC is quite good.
If the Goodyears are not stiffer sidewalls than the Michelins then I'll eat my hat. And by the way, I've had Goodyears, Michelin Pilot Sport PS2s and Pilot Sport AS/ZPs on my Vette within the space of a week. I got the chance for a good comparison.
Stiffer than a stiff thing
and raise you http://corvetteactioncenter.com/kb/q....php?qstId=515 Take a look at para 2
"When deflated the EMTs on Vettes are rated by GM for 200 miles in 73 degrees weather at 55 mph with the car at gross weight"
As with all these things its who you believe but the article on CAC is quite good.
If the Goodyears are not stiffer sidewalls than the Michelins then I'll eat my hat. And by the way, I've had Goodyears, Michelin Pilot Sport PS2s and Pilot Sport AS/ZPs on my Vette within the space of a week. I got the chance for a good comparison.
Stiffer than a stiff thing
BTW, I'm a Michelin man all the way. Don't care for the French, but the Michelin is a hell of a tire.Ed
Last edited by C5XTASY; Apr 17, 2007 at 05:38 PM.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
I believe the new Goodyear runflats have been redesigned for a better ride. The cost of redesigning, and testing, may also be the reason for the increased price. Hib's article was written in 2004, so the 200 miles at 50 mph, that he mentions, while true on the originals, may be old news now. The ad that claims the Goodyear runflat runs 50 miles at 50 mph is an actual Goodyear ad. BTW, I'm a Michelin man all the way. Don't care for the French, but the Michelin is a hell of a tire.
Ed
BTW, I'm a Michelin man all the way. Don't care for the French, but the Michelin is a hell of a tire.Ed
So I guess the C6 owners may get tires that ride better and don't roar as much? Still can't see why the price hike should affect the older design that the C5 is fitted with or can you even get that spec any more? Can't imagine any C5 owner re-shoeing with a full set of Goodyears at a higher price than the other options
It begs the question though. If the new tires have a lower rating that must mean softer sidewalls. If so, can you mix and match with 200 mile spec tires. It may affect the handling. Do the new 50/50s still meet GM spec on the C5? That was after all the reason for the hard sidewalls in the first place. If I was in that situation I think I'd be asking Goodyear & GM the question.
I guess its all academic really. If you have a flat you get to the nearest repair shop. If it's 250 miles away and you'd no choice I guess you'd just press on or call out AAA.
Last edited by DeeGee; Apr 18, 2007 at 01:23 AM.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
I choose the best. I bought the Vette because its the best sports car in its category.
I bought the Michelins because I did the research and, from the limited choice of run flats, the ZPs were the best available. I had serious problems with noise and tramlining. My Vert now drives like a sports car.
I may agree with your sentiments but it doesn't affect what I buy for the Vette.
Last edited by DeeGee; Apr 18, 2007 at 01:17 AM.
Drifting
Joined: Oct 2004
Posts: 1,664
Likes: 0
From: Sonoran Desert of Arizona
I'll see your and raise you
http://corvetteactioncenter.com/kb/q....php?qstId=515 Take a look at para 2
"When deflated the EMTs on Vettes are rated by GM for 200 miles in 73 degrees weather at 55 mph with the car at gross weight"
As with all these things its who you believe but the article on CAC is quite good.
If the Goodyears are not stiffer sidewalls than the Michelins then I'll eat my hat. And by the way, I've had Goodyears, Michelin Pilot Sport PS2s and Pilot Sport AS/ZPs on my Vette within the space of a week. I got the chance for a good comparison.
Stiffer than a stiff thing
and raise you http://corvetteactioncenter.com/kb/q....php?qstId=515 Take a look at para 2
"When deflated the EMTs on Vettes are rated by GM for 200 miles in 73 degrees weather at 55 mph with the car at gross weight"
As with all these things its who you believe but the article on CAC is quite good.
If the Goodyears are not stiffer sidewalls than the Michelins then I'll eat my hat. And by the way, I've had Goodyears, Michelin Pilot Sport PS2s and Pilot Sport AS/ZPs on my Vette within the space of a week. I got the chance for a good comparison.
Stiffer than a stiff thing
the Owners manual that came with the EMT's on my 2002 state:
" Although the Eagle F1-GS EMT has been designed to give up to 200 miles of service at sustained speeds of up to 55 mph at low or zero air pressure, after such extreme usage the tire would have to be replaced.
However, there are some things you can do to help prolong tire life at low inflation conditions. Keeping the top speed as much below 55 mph as possible and driving less that 200 miles will minimize the deterioration form running deflated. And if you drive less that 50 miles, there is a good chance that the tire will be repairable (unless the initial damage that caused the air loss was too severe). Driving at lower speeds may also extend the usable runflat life."
Based on that information even back in 2002 Goodyear was using the 200 miles as a marketing tool. When you read their statement the 200 miles is a wishful statement under ideal conditions.
Now 5 years later their website states the same 50 miles as the competitors.
I am curious as to how you were able to run all 3 of those tires in a flat condition to do your own test in such a short period of time.
Burning Brakes
Joined: Mar 2005
Posts: 1,112
Likes: 1
From: Torrance CA
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Didn't drive them flat. my comment was on the tires performance at operating pressure. You can definitely tell the difference betweeen the ZPs and the OEMs in terms of sidewall stiffness. Chalk and cheese. I've only driven the OEM at 8 psi after a flat.
Long story but I ordered PS ZPs, but the dealer fitted PS2s by mistake. I drove those around for 2 weeks until the ZPs arrived. I drove both the PS2s and the ZPs around the same 5 mile route as a comparison. Must say, around town there was not a massive difference.
So, within 2 weeks I had OEMs, PS2s and ZPs on the car.
Last edited by DeeGee; Apr 19, 2007 at 04:47 PM.
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