I did a quick check on an 1/18 scale diecast jeep here - the tyre measures around 41mm diameter, which scales up to 656mm diameter full size (maybe Rex or Rich could confirm the true size for us?). Scaling back to 1/16 would put the tyre at 65.5mm diameter - which is the same diameter as the other WPL / JJRC / Helifar tyres, so I'm feeling pretty confident this is 'about' right.

CCKW tyres scale out to about 56mm at 1/16, so its going to be way too big for them. However, the larger standard tyres used on the M3 halftrack/scout car family, M8 Greyhound, 4ton 6x6, and 6ton 6x6 trucks would be about that kind of size.
You'd have to replace the rims, but thats not exactly difficult in the age of 3D printing. My only concern would be the width of the tyre - they look a little too wide for using in dualie setups?

What we need now is a guiniea pig to buy one and measure it for us...