Tire Date Code Question
Melting Slicks
Joined: Dec 2002
Posts: 2,390
Likes: 315
From: Belmont Michigan
Tires made before 2000 are decoded by the last 3 numbers, as the week (18) and then the year (4). So it could be either 1984 or 1994. Just going from memory, I don't believe that size was even around in 1984, so most likely it would be 1994. Either way they are way too old to drive on!
Now that I think about it, when I bought my '75 last year it still had GR70/15 tire on it that decoded to 1984, so I think the old sizing system was still in place then.
Now that I think about it, when I bought my '75 last year it still had GR70/15 tire on it that decoded to 1984, so I think the old sizing system was still in place then.
Thread Starter
Melting Slicks
Joined: Oct 2013
Posts: 2,569
Likes: 126
From: San Diego California
Tires made before 2000 are decoded by the last 3 numbers, as the week (18) and then the year (4). So it could be either 1984 or 1994. Just going from memory, I don't believe that size was even around in 1984, so most likely it would be 1994. Either way they are way too old to drive on!
Now that I think about it, when I bought my '75 last year it still had GR70/15 tire on it that decoded to 1984, so I think the old sizing system was still in place then.
Now that I think about it, when I bought my '75 last year it still had GR70/15 tire on it that decoded to 1984, so I think the old sizing system was still in place then.
They are in amazingly good shape. No sidewall checking anywhere. Must have been stored out of any direct sunlight. And how cold does it ever get in San Diego? Just great looking anyway.
Le Mans Master
Joined: Sep 2002
Posts: 5,228
Likes: 895
From: Myrtle Beach SC
The P255/60R15 were introduced in 1978 by Good Year on the Pace Cars but available to with any coupe. Either way, they could have been 84 or 94.
Melting Slicks
Joined: Dec 2002
Posts: 2,390
Likes: 315
From: Belmont Michigan
Melting Slicks
Joined: Sep 2011
Posts: 3,372
Likes: 215
From: Peoria Arizona
While doing some research on the subject, I found a few places on the web where people had posted up about old tires exploding. A least two cases I found happened while the car was just sitting in their garage. Good thing - while driving could have been really bad.
On a fiberglass car, tires coming apart is never going to end up well.
Adam
