This is one of the reasons that there should be some exceptions in
the concours world. This owner also wanted his car to be totally
correct and did not install seat belts. I see many cars that are
running on old tires that should be replaced. There is a date on a
tire that will tell you how old they are and for saftey reasons I
recommend that a tire that is over 8 years old be replaced no matter
what the wear is on the tread. Due to the aging of the rubber.
The following info is from Tire Racks web site on dating tires
David Nock
o?<
When it comes to determining the age of a tire, it is easy to
identify when a tire was manufactured by reading its Tire
Identification Code (serial number). Unlike vehicle identification
numbers (VINs) and the serial numbers used on many other consumer
goods (which identify one specific item), Tire Identification Codes
are really batch codes that identify which week and year the tire was
produced.
The U.S. Department of Transportation (DOT) National Highway Traffic
Safety Administration (NHTSA) requires that Tire Identification Code
be a combination of eleven or twelve letters and numbers that
identify the manufacturing location, tire size, manufacturer's code,
and week and year the tire was manufactured.
Today, the week and year the tire was manufactured is contained in
the last four digits of the serial number, with the 2 digits used to
identify the week a tire was manufactured immediately preceding the 2
digits used to identify the year.
Examples of tires manufactured since 2000 with this Tire
Identification Code format:
XXXXXXXX 0600
XXXXXXXX 0600
06 - Manufactured during the 06th week of the year
XXXXXXXX 0600
00 - Manufactured during 2000
And
XXXXXXXX 0604
XXXXXXXX 0600
06 - Manufactured during the 06th week of the year
XXXXXXXX 0604
04 - Manufactured during 2004
The Tire Identification Code for tires produced prior to 2000 was
based on the assumption that no tire would be in service for ten
years. They were required to provided the same information, with the
week and year the tire was built contained in the last three digits.
The 2 digits used to identify the week a tire was manufactured
immediately preceded a single digit used to identify the year.
For example, if the Tire Identification Code on a tire reads:
XXXXXXXX 0680
XXXXXXXX 0600
06 - Manufactured during the 06th week of the year
XXXXXXXX 0680
8 - Manufactured during the 8th year of the decade
While the previous serial number format identified that a tire was
built in the 8th year of a decade, there was no universal identifier
that confirmed which decade (tires produced in the 1990s may have a
small triangle following the Tire Identification Code to identify the
decade). The Tire Identification Code format used since 2000
accurately confirms the year.
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