,,, I have been using the same 10 lug rims for my ol 809 and 939 series, there are a few minor differences in looks in new versus old 10 lug standard rims, with that said, the tire the G177 was issued to the 939 series, but found there way onto other 809s in at least one instance a couple of times I saw up here on an 818 and wrecker over the years. the rim of the bridge truck are different though i believe. only things i know are what i have done, always willing to learn, but never seen a difference, I have had 30 rims loose over time 10 lug, but it is always possible i had all one type, but would have had to see that one...