Farmall Tires

Farmall is the small-tractor line International Harvester ran from 1923 to 1973, and the Cub and Super A are the smallest of the bunch — Cub production stretched all the way to 1979 because nothing else could quite replace it on small farms. Both are still in active restoration today, and tire wear on a tractor that's been sitting under a tarp for forty years is the part most owners underestimate when they pull one out of a barn.

The Cub takes 4.00-12 fronts and 8.3-24 rears as its most-common spec; the Super A takes 5.00-15 fronts and 9.00-24 rears. Older sidewalls sometimes wrote those rears as “9-24” without the decimal — same tire. Owners restoring to original-equipment spec usually want a 3-rib front and an R-1 ag rear; period-correct Firestone reproductions exist, and modern BKT and Goodyear options cost less if the tractor is going to work rather than show.