Tires are not virions; they do not infect a car; and they are already standardized so you know in advance which models of a tire will fit on the rims of each vehicle.
No mutation is involved.
Mutation of a virus—in this case, say, the sRBD or the entire spike—whether by direct genetic editing or repeated introduction to new hosts and cultivating the results repeatedly to effectuate increased affinity to certain cellular receptors on a new host—
is NOT just taking an unmodified set of tires and swapping them onto the rims of a second vehicle to evaluate driving performance.
You are deliberately lying through your teeth by using a mixed metaphor to attempt to mislead readers as to the enormity (biological warfare) of what was actually done.
Troll.
Stupid phenomenon keyboard.
RBD (receptor binding domain) not sRBD (fat ffingers)
Stupid otto-corrupt.
Phone not phenomenon.