Where can I get a yellow tire?

I’ve been searching for a yellow 20x2.125 sized tire for my unicycle, but I can’t seem to find anywhere online that they have them available for sale, so if anyone can point me in the direction of one it would be appreciated.

Does the wideness matter? or does it just have to be a certain wideness to work

What are you using it for?

sun 20" flat top unicycle