CUCV rims ID on M101A2 trailer??

All,

I am looking for a spare tire/rim for my M101A2 trailer. It has CUCV rims on it (Not Hummer) Is there an easy way to tell if they are 16 or 16.5 inch rims? I know there is that info stamped on the INSIDE of the rim. There is a local junkyard up the road thats closing and getting cleaned up. They have several old Chevy K-5 Civy type Blazers with the steel wheels. Will these K-5 rims work? I think so, but I want to get some opinions from the experts.

Thanks!

How many lugs do they have? If they are 6 lug, they would be most likely 15". If they are 8 lug, they could be 16 or 16.5, and the tires that are on it should say what size they are. In the end for a spare, it shouldnt matter, as long as the final diameter is pretty close to the same as your other tires.

They are 8 lugs.

Just FYI. The M101A2 trailer tires (Pre humvee tires) are on 16x6.5 rims, and I found dozens of them at the local junkyard off of 3/4 and 1 ton Chevy's from the mid 1980's