Dyno Fireball Tire

I’ve been looking for a Dyno Fireball 4X6 tire. I’ve found several places
that have the Dyno Super Slick, and a couple that have the Fireball
2.125–but no 4X6 so far. Here is my question. Is the 4X6 only made in
the 20 inch and 24 inch size? I had assumed they made a 26 inch
version–which would be very nifty on my ultimate wheel. Has anyone tried
the 26 by 2.125 Fireball?

David Maxfield Bainbridge Island, WA