Feb 23, 2015, 04:10 PM
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Runflat Tires
Thread Starter
8th Gear
Joined: Aug 2013
Posts: 8
Likes: 1
Runflat Tires
Runflat v non runflat tires
I have runflat Pirelli,s on back. 275\40R18 PZERO NERO A/S RFT.
Car is a little squirrely
Had KUMO's before no problems
I see posts saying some don't want runflats.
Why-why not?
Any one have ideas?
I have runflat Pirelli,s on back. 275\40R18 PZERO NERO A/S RFT.
Car is a little squirrely
Had KUMO's before no problems
I see posts saying some don't want runflats.
Why-why not?
Any one have ideas?
Team Owner
Joined: Jul 2006
Posts: 22,109
Likes: 4,137
From: Kannapolis NC
Melting Slicks
Joined: Nov 2014
Posts: 3,399
Likes: 1,338
From: Havre de Grace Maryland
I bought my 04 in September 2014 with factory run flats that were 3 years old with 10% worn. I have read many negitives about run flats. My test is driving the car to make a determination whether I will dump the run flats for new tires. I did not find them noisy or the other negatives that the forum writers discuss. But I am a easy driver not doing anything during my drives that would put stress on the vehicle. Just my .02 worth.
Melting Slicks
Joined: Mar 2007
Posts: 2,579
Likes: 291
From: Carmel Indiana
Its my wife's car, just put new Mich AS Plus run flats on couple weeks ago. I just don't want her stranded, even for an hour waiting for tow truck, rather her drive 50 mi to a safe location.
and as you say, we had 8yr old GY run flats and never noticed the noise or the performance since we never take the car to any limit on traction.
and as you say, we had 8yr old GY run flats and never noticed the noise or the performance since we never take the car to any limit on traction.
Drifting
Joined: Apr 2006
Posts: 1,936
Likes: 13
From: Redding California
The stiff sidewalls of runflat tires transmit more road noise as well as a substantial increase in harshness of ride quality. For these reasons many switch to non-runflats which have softer, more flexible sidewalls, and therefore produce a smoother and quieter ride.
Runflat tires give you some security if you get a flat, with non-runflats you should carry a repair kit. (The C5 Z06 came from the factory with non-runflats and a tire repair kit)
Non-runflats are approx 20% cheaper than runflats.
You have to weigh up whether you want the security or the smoother, quieter ride. I have driven with both and find the non-runflats considerably smoother and quieter. I have also found that of the tires I have tried, Michelin Pilot Sports have been the quietest and smoothest.
.
Runflat tires give you some security if you get a flat, with non-runflats you should carry a repair kit. (The C5 Z06 came from the factory with non-runflats and a tire repair kit)
Non-runflats are approx 20% cheaper than runflats.
You have to weigh up whether you want the security or the smoother, quieter ride. I have driven with both and find the non-runflats considerably smoother and quieter. I have also found that of the tires I have tried, Michelin Pilot Sports have been the quietest and smoothest.
.
Le Mans Master
Joined: Sep 2013
Posts: 8,900
Likes: 1,072
From: Wisconsin
The stiff sidewalls of runflat tires transmit more road noise as well as a substantial increase in harshness of ride quality. For these reasons many switch to non-runflats which have softer, more flexible sidewalls, and therefore produce a smoother and quieter ride.
Runflat tires give you some security if you get a flat, with non-runflats you should carry a repair kit. (The C5 Z06 came from the factory with non-runflats and a tire repair kit)
Non-runflats are approx 20% cheaper than runflats.
You have to weigh up whether you want the security or the smoother, quieter ride. I have driven with both and find the non-runflats considerably smoother and quieter. I have also found that of the tires I have tried, Michelin Pilot Sports have been the quietest and smoothest.
.
Runflat tires give you some security if you get a flat, with non-runflats you should carry a repair kit. (The C5 Z06 came from the factory with non-runflats and a tire repair kit)
Non-runflats are approx 20% cheaper than runflats.
You have to weigh up whether you want the security or the smoother, quieter ride. I have driven with both and find the non-runflats considerably smoother and quieter. I have also found that of the tires I have tried, Michelin Pilot Sports have been the quietest and smoothest.
.
Last edited by JR-01; Feb 12, 2015 at 06:49 PM.
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Team Owner
Joined: Aug 2003
Posts: 24,453
Likes: 309
From: Scottsdale AZ
I've heard that running runflats on one axle and non-runflats on the other can upset handling - - but others have said there's no difference.
I had Nitto 555's (non RF) on my car when I bought it and put Michelin RFs on-- a bit harder ride, but then I also put Bilsteins on at the same time- so might be hard to gauge. Michelins were twice the price of Nittos . . . but between the tires and AAA, I worry less about being stranded.
I had Nitto 555's (non RF) on my car when I bought it and put Michelin RFs on-- a bit harder ride, but then I also put Bilsteins on at the same time- so might be hard to gauge. Michelins were twice the price of Nittos . . . but between the tires and AAA, I worry less about being stranded.
Last edited by CQRT; Feb 13, 2015 at 09:14 AM.
Burning Brakes
Joined: Aug 2010
Posts: 1,148
Likes: 22
From: Portland OR
I changed out my RFs to V12evos on my convertible and it helped with the tire noise.There are untold numbers of Vet owners who have swapped out the runflats and as far as I am concerned,for the better.
Fred
Fred
Melting Slicks
Joined: Dec 2000
Posts: 3,274
Likes: 1,094
From: Pittsburgh PA
Drifting
Joined: Feb 2005
Posts: 1,643
Likes: 167
Race Director
Joined: Jul 2007
Posts: 17,655
Likes: 1,209
From: Aiken, SC
St. Jude Donor '13 thru '26
When I bought my car it had 11 year old run flat rocks on it...
After the purchase I didn't have run-flat cash so I went with non run-flats and a can of fix-a-flat.
The ride for me is 1000% better.
After the purchase I didn't have run-flat cash so I went with non run-flats and a can of fix-a-flat.
The ride for me is 1000% better.
Intermediate
Joined: May 2010
Posts: 32
Likes: 1
From: Orangeburg Ny
After a couple of times of putting on new run flats when they wore out( which happens pretty quick with the factory good years)I finally went with non run flats, the ride was much improved and the noise was reduced signifantly,I know other owners have tried other brands, but I went with continental extreme contact DWS's, they were half the cost of the run flats, and are supposed to last for 50k miles.
Le Mans Master
Joined: Sep 2013
Posts: 8,900
Likes: 1,072
From: Wisconsin
The OP was looking for advice. He wasn't sure what he wanted.
Last edited by JR-01; Feb 12, 2015 at 09:10 PM.
Burning Brakes
Joined: Nov 2011
Posts: 1,145
Likes: 128
From: Valdosta GA
St. Jude Donor '15-'16-'17-‘18-'19-'20-'21-'22
I've got Michelin Pilot Sport A/S Plus ZP (run flat)--
Happy with their comfort and lack of noise --and they also grip pretty well -- wet or dry.
http://www.tirerack.com/survey/Surve...%3D74YR8PSASZP
http://www.tirerack.com/tires/tires....e&autoModClar=
Just my .02.
Happy with their comfort and lack of noise --and they also grip pretty well -- wet or dry.
http://www.tirerack.com/survey/Surve...%3D74YR8PSASZP
http://www.tirerack.com/tires/tires....e&autoModClar=
Just my .02.
Le Mans Master
Joined: Sep 2013
Posts: 8,900
Likes: 1,072
From: Wisconsin
I've got Michelin Pilot Sport A/S Plus ZP (run flat)--
Happy with their comfort and lack of noise --and they also grip pretty well -- wet or dry.
http://www.tirerack.com/survey/Surve...%3D74YR8PSASZP
http://www.tirerack.com/tires/tires....e&autoModClar=
Just my .02.
Happy with their comfort and lack of noise --and they also grip pretty well -- wet or dry.
http://www.tirerack.com/survey/Surve...%3D74YR8PSASZP
http://www.tirerack.com/tires/tires....e&autoModClar=
Just my .02.
Melting Slicks
Joined: Dec 2000
Posts: 3,274
Likes: 1,094
From: Pittsburgh PA
Actually it does. If getting a flat tire is no big deal, then save your money, get better handling and ride and go with non runflats. The only benefit of runflats is if you get a flat tire. So it is your choice.
The OP was looking for advice. He wasn't sure what he wanted.
The OP was looking for advice. He wasn't sure what he wanted.
Drifting
Joined: Apr 2006
Posts: 1,936
Likes: 13
From: Redding California
$1,180 minus 20% is $944
$896 plus 20% is $1,075
So I think my 20% estimate is fairly accurate.
.
Drifting
Joined: Feb 2005
Posts: 1,643
Likes: 167
