OK to mix runflat brands?
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Joined: Jul 2000
Posts: 52
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From: SF Bay Area
OK to mix runflat brands?
My rear Goodyear EMT's have about had it while my fronts
are still in good shape. Has anyone run different brands of
runflats at the same time? Like SZ50's at the rear and GY EMT's
at the front?
are still in good shape. Has anyone run different brands of
runflats at the same time? Like SZ50's at the rear and GY EMT's
at the front?
Tech Contributor
Joined: Oct 1999
Posts: 41,055
Likes: 9,817
From: Charlotte, NC (formerly Endicott, NY)
Re: OK to mix runflat brands? (caliC5)
The tires handle differently. The SZ50s have a lot more traction so you might be OK running that combo with them in the rear but I would not do it for long.
Bill
Bill
Melting Slicks
Joined: May 2000
Posts: 2,375
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From: Portland OR
Re: OK to mix runflat brands? (caliC5)
I would never run different brands of runflats front and rear. If you check the inside edge of your present tires you may well find that they are cupped. My fronts were cupped bad enough with 6/32" tread left that the tire store refused to sell them as used tires and insisted they should discard the tires.
Get a full new set of Michelin Pilot Sport A/S ZPs. :yesnod:
Get a full new set of Michelin Pilot Sport A/S ZPs. :yesnod:
Pro
Joined: Sep 2000
Posts: 505
Likes: 0
Re: OK to mix runflat brands? (caliC5)
The sidewall of the Firstone tire is not as stiff as the Goodyear EMT (hence the smoother ride). This alone would cause the tires to have vastly different handling characteristics. I would imagine that this combination would produce a real "squirrely" feeling ride and a down right dangerous handling condition. I have the Firehawk SZ50EP RFTs on my car and like them very much, but INMO mixing brands and construction types is a real bad idea.
Le Mans Master
Joined: Jul 2000
Posts: 7,726
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From: Joplin MO
Re: OK to mix runflat brands? (redriverjohn)
The sidewall of the Firstone tire is not as stiff as the Goodyear EMT (hence the smoother ride). This alone would cause the tires to have vastly different handling characteristics. I would imagine that this combination would produce a real "squirrely" feeling ride and a down right dangerous handling condition. I have the Firehawk SZ50EP RFTs on my car and like them very much, but INMO mixing brands and construction types is a real bad idea.
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Re: OK to mix runflat brands? (caliC5)
My rear Goodyear EMT's have about had it while my fronts
are still in good shape. Has anyone run different brands of
runflats at the same time? Like SZ50's at the rear and GY EMT's
at the front?
are still in good shape. Has anyone run different brands of
runflats at the same time? Like SZ50's at the rear and GY EMT's
at the front?
Drifting
Joined: Jun 2001
Posts: 1,511
Likes: 16
From: "Once you have flown, you will walk the earth with your eyes turned skyward; for there you have been
Re: OK to mix runflat brands? (Richin Chicago)
All good points... however, if you are positive you'll not be replacing the Goodyear EMT's then you have nothing to loose by installing the SZ50's on the back and driving it for a couple of days... if you find that the handling is compromised you should go ahead and replace the fronts with SZ 50's (if that is your runflat replcement of choice) I replaced all four of my GY's with the Firestone SZ50 RFT's and was completely satisfied with the swap. I found them to be much quieter and better traction/adhesion even though the contact patch is a bit smaller than the Goodyears...
[Modified by XmentalPilot, 9:41 PM 9/2/2002]
[Modified by XmentalPilot, 9:41 PM 9/2/2002]
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Le Mans Master
Joined: Dec 2001
Posts: 5,761
Likes: 1
From: Irvine CA
Re: OK to mix runflat brands? (caliC5)
The Vette has Active Handling and Traction Control with sensors that are calibrated to the width of the tires you have. Having tires of different properties will screw this system.
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Re: OK to mix runflat brands? (c5chris)
The Vette has Active Handling and Traction Control with sensors that are calibrated to the width of the tires you have. Having tires of different properties will screw this system.
