Or call Tom Stowers and ask him

wrote:
On Sep 18, 1:43 pm, gfoster07k wrote:
Does anyone know a source for the little (about) 3 inch hard rubber
wheels that seem to be on the dollys in most Minden trailers? I had
one break yesterday.

Greg

Just google "caster wheels". You'll find lots of sites where you can
match up based on size, material and weight limits.

Here's a couple examples:

http://www.castercity.com/polyolefinw.htm
http://www.wheelandcaster.com/p_wheels_reg.php?duty=1