CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
October 31, 2014, 05:52:13 AM

Login with username, password and session length
Search:     Advanced search
Welcome to the CRG Discussion Forum!
Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
105860 Posts in 12353 Topics by 4762 Members
Latest Member: HarryQ
* Home Help Search Login Register
+  CRG Discussion Forum
|-+  Camaro Research Group Discussion
| |-+  Decoding/Numbers
| | |-+  Original GOODYEAR E70-15 Wide Tread GT, Date Code?
« previous next »
Pages: 1 [2]  All Print
Author Topic: Original GOODYEAR E70-15 Wide Tread GT, Date Code?  (Read 1004 times)
69Z28-RS
Hero Member
*****
Posts: 2465


owner since '76


View Profile Email
« Reply #15 on: May 28, 2014, 09:54:29 AM »

What was the FIRST date for required DOT tire marking (when all manufacturers were required to mark per the DOT's mandate)??  Wasn't that sometime in the '60's??   Before that DOT required time, the only 'dated' marking on the tires would have been by manufacturer and all of them would be different....?
Logged

Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
firstgenaddict
Hero Member
*****
Posts: 1252



View Profile WWW
« Reply #16 on: May 28, 2014, 09:57:49 AM »

Anyone have a similar decoding reference for Firestone?
My brother works for Firestone corp and he hasn't been able to get an answer on the 60's era tire codes
Logged

James
Collectin' Camaro's since "Only Rednecks drove them"
 
Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://picasaweb.google.com/112392262205377424364/1969_Z28_Restoration
JohnZ
CRG Member
*****
Posts: 4126


View Profile Email
« Reply #17 on: May 28, 2014, 10:18:31 AM »

What was the FIRST date for required DOT tire marking (when all manufacturers were required to mark per the DOT's mandate)??  Wasn't that sometime in the '60's??   Before that DOT required time, the only 'dated' marking on the tires would have been by manufacturer and all of them would be different....?

The DOT tire marking requirement was effective for the beginning of the 1968 model year, but there was no standard format for the information and the manufacturers each used their own proprietary coding, so the markings weren't understandable or relevant. The law was amended shortly thereafter and a standard format for the TIN (Tire Identification Number) was mandated, effective mid-May, 1971. John Kelsey of Kelsey Tire can decode the TIN on Goodyear tires made between 1968 and 1971, but as far as I know, nobody can decode the TIN from any other tire brands from that period.
Logged

'69 Z/28
Fathom Green
CRG
69Z28-RS
Hero Member
*****
Posts: 2465


owner since '76


View Profile Email
« Reply #18 on: May 28, 2014, 10:27:38 AM »

Thanks JohnZ...  Smiley
That answers the question I had...  so basically before the 1972, the only period correct tires that *might* have a relevant (deterministic) tire date code would be the Good Years....

Gary
Logged

Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
Bryan302
Member
***
Posts: 46


View Profile Email
« Reply #19 on: May 28, 2014, 03:46:25 PM »

Hi Steve,

Here is the code off my WTGT tire.  It is JU05861.  JU for 69; 05 May?.  I'm sorta puzzled because of all numbers past JU.  I looked pretty close and they all appeared to be numbers.  Would is help or make it right if the 8 was a B.

Thanks,
Bryan
Logged

Bryan S.
1968 RS Z/28, 12E, PNT R2, TR 749
1969 Z/28 X33, 05A, PNT 52 52, TR 719, endura bumper
ZLP955
Member
***
Posts: 464



View Profile
« Reply #20 on: May 28, 2014, 04:56:35 PM »

Anyone have a similar decoding reference for Firestone?
My brother works for Firestone corp and he hasn't been able to get an answer on the 60's era tire codes
Thanks James
Logged

Tim - New South Wales, Australia
04A VN '69 z/28 69-69 715 ex-E/MP
janobyte
Hero Member
*****
Posts: 756


1968 z/28

bajcer@msn.com
View Profile Email
« Reply #21 on: May 28, 2014, 07:43:52 PM »

Feb,1969   plant GAD....according to chart. Check on the Mustang forums ( Shelby) Lots of info(links) on some threads there. Dig deep enough and you'll  find what you are looking for.Started with a guy wanting to verify the spare he had in the trunk. Unless pure coincidence, the numbers on my tires (5) coincide with the chart and translate to the proper time frame ( build date). Sorry can't be more help Bryan ,one of many numbers, and not a lot about it. Did my reading last year around this time, found what I was looking for and moved on. Shame about the tires, they were severely abused(hole shots) very early in the history of the car and used solely for winter storage. Most likely were off the car by 69. Side walls show no dry rot. In 90 I wanted to put the Ralleys back on and had new tires mounted, decided to keep them.

Logged
Bryan302
Member
***
Posts: 46


View Profile Email
« Reply #22 on: May 28, 2014, 11:53:40 PM »

Thanks Jano,

Well, I finally caught on.  The first set of letters were throwing me off at first.  Thanks for your time and effort.  I'm going to make myself a pocket chart for swap meets.
Thanks again,
Bryan
Logged

Bryan S.
1968 RS Z/28, 12E, PNT R2, TR 749
1969 Z/28 X33, 05A, PNT 52 52, TR 719, endura bumper
Pages: 1 [2]  All Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.076 seconds with 18 queries.