I just bought a Coker 2.75 x 21 Firestone reproduction tire. These just came out recently, and are ribbed like a Servi-Cycle tire. I mounted it to the rear and put my original Simplex 27 x 3 tire on the front. The Firestone tire is about 1/2" taller than the Simplex tire. It is also about 1/2" larger in the bead, but seems to mount and seat well.. I think this is about as good as we can get for these Sportsman rims.
What do you guys think?