Tire replacement by age
10-24-2010, 11:35 AM
#1
Banned
Thread Starter
Tire replacement by age
When I purchased my 2005 997 it only had 5000 miles on it.
Now at the end of 2010 I have 10,000 miles on 6 year old tires.
Can I get some opinion on whether the original tires should be replaced without question due to age? (I believe advertised life is 5 years)
Now at the end of 2010 I have 10,000 miles on 6 year old tires.
Can I get some opinion on whether the original tires should be replaced without question due to age? (I believe advertised life is 5 years)
10-24-2010, 11:47 AM
#2
Poseur
Rennlist Member
Rennlist Member
You're smart to suspect those tires. 6 years is the magic number by which a tire should be retired (not a pun!) Replacing those tires will make a dramatic improvement in the performance of that car.
10-24-2010, 01:10 PM
#4
Drifting
If it helps lessen the pain at all, tire technology has changed considerably in the last 6 years, too, and there are a slew of new street tires that blow away the OEM tires in performance. Even really inexpensive ones like Sumitomo HTR ZIII.
10-24-2010, 01:18 PM
#5
Three Wheelin'
Not ****. 6 years is long enough for the rubber to harden enough to lose grip and (slightly) increase the chance of a catastrophic failure from a pot hole, etc.
10-24-2010, 07:42 PM
#6
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BTW Tires are now date stamped, look for a rough moulded oval looking area on the sidewall with four numbers in it.
First two numbers are the week of the year, the last two are the year the tire was manufactured.
First two numbers are the week of the year, the last two are the year the tire was manufactured.
Last edited by Bijan; 10-24-2010 at 08:00 PM.
10-24-2010, 08:28 PM
#7
Rennlist Member
I agree that it's a good idea to replace old tires, but how about the following true story?
A few months ago an "old" autocrosser I know showed up at our SCCA region's autocross with the same old Dodge Colt he drove 20 years ago and picked up just where he left off; winning his class on 23-year-old tires (I saw the build date on the tire). His son is still autocrossing the car regularly, but with new tires.
A few months ago an "old" autocrosser I know showed up at our SCCA region's autocross with the same old Dodge Colt he drove 20 years ago and picked up just where he left off; winning his class on 23-year-old tires (I saw the build date on the tire). His son is still autocrossing the car regularly, but with new tires.
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10-24-2010, 09:26 PM
#8
Yes. I learned this the hard way. Crashed another car I had years ago on Michelins with a LOT of tread left on them and were 4 years old. On emergency braking the car just slid and slid!
The tires on my C2S are 3 years old now and I am growing tired of procrastinating!
The tires on my C2S are 3 years old now and I am growing tired of procrastinating!
10-24-2010, 11:18 PM
#10
Former Vendor
Above thoughts are sound. 6 years on a performance tire is getting to the point there will be degradation in the tire's performance due to hardening of the rubber. They may look fine, and probably are from a construction standpoint, but will likely be at the point where it's possible that they are losing grip. We have a few great writeups here, here, and here.
10-25-2010, 12:15 AM
#12
10-25-2010, 09:49 AM
#13
Banned
Thread Starter
OK I've only used PS2's and the Pirelli's on my previous Porsche's. Of those I prefer the PS2's.
The car is not raced or tracked. Any others that I should consider?
The car is not raced or tracked. Any others that I should consider?
10-26-2010, 10:00 PM
#14
Drifting
Above thoughts are sound. 6 years on a performance tire is getting to the point there will be degradation in the tire's performance due to hardening of the rubber. They may look fine, and probably are from a construction standpoint, but will likely be at the point where it's possible that they are losing grip. We have a few great writeups here, here, and here.
