I have a 1952 super c that I need to change the rims on. The tire that is on the tractor now is 11.2x36. the rim size that I found on another web sight states that I need to have a 10x36 rim. I found a bunch of sights that are selling 9x36 rims saying that they are for c's, super c's ect. I am wondering if my tire will fit the smaller rim? Or maybe it is the same rim just the measurements are taken from a different part of the rim? any info will be greatly appreciated.

Per my Super C Parts Catalog the rim sizes available on your tractor when built were 8"-36 and 9"-36 and a 10" rim is not noted in the catalog. The tire sizes have changed over the years but in todays world most folks are using 11.2 X 36 tires on their Super C's with the 9" rims which look right to my eyes as that is what I have on my 1953 Super C. Send me a reply to my email with your email address and I'll send you a photo or two showing 11.2 X 36" Firestone F&R 151's on 9" rims if would like to see what they look like. I don't have a clue or the computing skills to post a photo on this site and have long quit even trying but have no problem sending them as an attachment to an email, Hal.
P.S. By the way the rim width is the measurement of the inside dimension between the two surfaces where the tire bead seals against the rim. When your Super C was produced the tire size was the approximate width of the tread and by todays sizes the tire width is the width of the from sidewall to sidewall so a 11.2 today is approximately the same tire as a 10" tire when your tractor was built. Anything with a tread width between 9.5" and 10.4" would have been considered a 10" tire for your tractor.

Thank you Farmallhal for your help. You confirmed my suspicions.

You can also find out what you currently have on the tractor.

Stick a ruler through the gap between the rim and the hub, and align the end with the edge of the rim bead on the inside. Sight a measurement on the outside edge. A 9" rim should measure between 9.25" and 9.5". It measures 9" inside.

You want the vertical surface that the bead of the tire pushes against, not the lip.

Or you could make yourself a giant set of calipers out of cardboard.