a fellow I know has a '66 c10 fleetside that has been in his family since it was new. He still has the original wheels which have the 3 tabs/ears/dimples on his 15 inch steel wheels.

From what I have learned, the four tab/ear/dimple wheels are late 50's to early 60's model 6 lug truck wheels.

Here are some pictures of my wheels:

http://picasaweb.google.com/Woogeroo/1965NewToMeSteel15InchWheels#

http://matraca.home.mindspring.com/img05302006/05302006.html


The 4 or 3 tab wheels all fit the same as far as I know, the lug pattern is the same. When I bought my truck 3 of my wheels were the four tabs and the other 2 wheels had the three tabs(all four wheels plus the spare).

I hope this helps.


-W