Re: I.D markings for 1970 and 1972 Rallye Wheels

[Jack H.]

This is nicely described in the 1970-72 NCRS Judging Guide. If you don't have a copy, you ought to order one through the NCRS Merchandise center in Cincinnatti. You'll find lots of information about your classic Corvette that's handy! (513) 385-8526.

Basically, wheel rim is 'wacked' surrounding the valve hole with Kelsey Hayes source ID, date of KH mfg and style/code for wheel. Specifics were given on the NDB and can be found in the archieves and/or your copy of the JG.

[John Rohe]

Re: I.D markings for 1970 and 1972 Rallye Wheels

Jeff,

The informaiton I'm sharing with you here is right out of Colvin's "By the Numbers 1970-1975" book. I'm certainly no expert on wheels...

The rally for 1970 and 1972 are the same wheel, coded "AZ" to the right side of the valve stem (when the valve stem is in the 12 o'clock position). All "left" and "right" that I mention will refer to the valve stem at 12 o'clock. In fact all 1969 through (at least) 1975 use the "AZ" wheel. I don't know how much later than 1975 these wheels were used in production.

As Jack mentioned in his earlier post, the date code surrounds the valve stem. All of these wheels were produced by Kelsey-Hayes, and there should be a three- digit code (to the left of the valve stem) beginning with "K". The "K" stands for Kelsey-Hayes. The second digit represents which Kelsey-Hayes plant produced the wheel. The third digit represents the year in which the wheel was produced (NOT the model year). For this third digit, a "0" would be 1970, a "1" 1971, etc... Also to the left of the valve stem shoud be a one- or two-digit month code (e.g. 2 = February, 10 = October). To the right of the valve stem should be a one- or two-digit day code. Put the three date pieces together and you'll figure when your wheels were produced.

Also, there might also be date codes on the inside (tire side) of the rim, as well as on the "spider" (center) section of the wheel. I know on a 1967 15x6 "DC" rally that I have (actually incorrectly coded "DG", which was the code for a 14x6 rally) there is no date code visible with the tire on the wheel (and it's a 15" original spare tire, so I know this wheel is really 15"). I don't know if the date coding moved from "inside" the wheel to "outside" at any particular point in time, or if it varied by type of wheel.

Lastly, in Colvin's book the wheel he demonstrates the date codes off of is an "AG" wheel, which is a 1968 15x8 rally, but it is dated October 4, 1971 since it is a service replacement. So even if the date coding to you doesn't make sense, it may still be correct.

Have fun, John R.

[John Rohe]

Re: I.D markings for 1970 and 1972 Rallye Wheels

Jeff,

The informaiton I'm sharing with you here is right out of Colvin's "By the Numbers 1970-1975" book. I'm certainly no expert on wheels...

The rally for 1970 and 1972 are the same wheel, coded "AZ" to the right side of the valve stem (when the valve stem is in the 12 o'clock position). All "left" and "right" that I mention will refer to the valve stem at 12 o'clock. In fact all 1969 through (at least) 1975 use the "AZ" wheel. I don't know how much later than 1975 these wheels were used in production.

As Jack mentioned in his earlier post, the date code surrounds the valve stem. All of these wheels were produced by Kelsey-Hayes, and there should be a three- digit code (to the left of the valve stem) beginning with "K". The "K" stands for Kelsey-Hayes. The second digit represents which Kelsey-Hayes plant produced the wheel. The third digit represents the year in which the wheel was produced (NOT the model year). For this third digit, a "0" would be 1970, a "1" 1971, etc... Also to the left of the valve stem shoud be a one- or two-digit month code (e.g. 2 = February, 10 = October). To the right of the valve stem should be a one- or two-digit day code. Put the three date pieces together and you'll figure when your wheels were produced.

Also, there might also be date codes on the inside (tire side) of the rim, as well as on the "spider" (center) section of the wheel. I know on a 1967 15x6 "DC" rally that I have (actually incorrectly coded "DG", which was the code for a 14x6 rally) there is no date code visible with the tire on the wheel (and it's a 15" original spare tire, so I know this wheel is really 15"). I don't know if the date coding moved from "inside" the wheel to "outside" at any particular point in time, or if it varied by type of wheel.

Lastly, in Colvin's book the wheel he demonstrates the date codes off of is an "AG" wheel, which is a 1968 15x8 rally, but it is dated October 4, 1971 since it is a service replacement. So even if the date coding to you doesn't make sense, it may still be correct.

Have fun, John R.