need help deciding what size tire/rim combo this is

[wilkin250r]

A tire that is listed as 16" wide isn't 16" wide at the bead, it's 16" wide at the sidewalls, properly inflated, as they bulge outwards. This section HAS to be wider than the rim, and the taller the sidewall, the bigger the difference.

A low-profile tire, like the kind you would find on a sports car, can have a section width very close to rim width. But a tall offroad tire needs to be much wider than the rim to protect the lip, seat properly, and function properly.

I have a set of tires 17 inches wide, 40 inches tall, and they were very difficult to mount on 14" wide rims. The local tire shop couldn't even do it at all, I had to mount them at home.

Interco themselves (the Manufacturer of the tires in question) specifies a 16x12 wheel for these tires, they don't specify a 14" width until the tire width gets over 18"