Originally Posted by Mike B
Starting in 1956 ALL Chevrolet 2-ton and larger trucks with Budd wheels were 6-lug on 8.75" circle. After 1955-2 only the 4000 series trucks had the 5/10 lug rims. if you got the optional 2-speed 15K pound rear the lug pattern still stayed the same.

Mike B smile


What year did they change back to the 5/10 bolt pattern? All of the 67-72 medium duty trucks I have seen but one were 5/10. Only seen 1 with the 6 lug pattern and the rest were daytons.