[Tom Goldman]

Another possible option is the Hoosier31 x 11.5 radial .
It's listed at 98 3/4" ,but I have a pair mounted for a Super Stock car I have in the shop that roll out at 99 3/4" on 13" wide rims tread width is just over 12" and a 16" cross section.
Weighs 1 pound more than the 13.5 tire It's what they call the drag bracket radial compound which according to racers who have run it is a very forgiving compound.
We'll find out as the car just has tub room for them and not much else in a radial.