This set of four small wheels and tires are perfect for different types of trailers.
They would be good for a boat trailer, small travel trailer, anything that requires a low clearance or isn't heavy.
How about the tow truck carrier that is used to support a disabled vehicle like below?
OD = .70"
Width = .25"
Axle Hole =
Four wheels, by Steven's Hobby, 1/25 scale.