Most of the aftermarket tires for model trucks are newer tubeless style radials, not much available in bias ply tube style tires.
I find that a bit strange when the majority of the US truck kits available to us are old, like most of the AMT trucks are from the late 60's early 70's.
So I'm a bit curious on why, I mean it would be nice to be able to build period correct truck models with accessories like different engine, wheels, tire options and such, but there are not much available from the time frame the kits are from as most of the stuff on the aftermarket are more modern.