PST markets several vehicle kits based on the MAZ tractor. Unfortunately, the plastic tires that come in the kits do not have an accurate tread pattern, and this set of 8 rubber tires is meant to fix that error. Note that the newest MAZ kit, #72060 - 'Multifunctional Radar Vehicle' for the SA-10 'Gramble' ADS, already comes with these new tires, and they do not need to be purchased separately for that kit.
These are the new tires:
These are the old tires on the completed kit:
And these are the new tires on a completed kit:
Here is a comparison; the old, kit tires are on the left, and these new rubber tires are on the right:
Here's another comparison showing the tread detail. New tires are on the left, and the old tires are on the right: