The 19.5" tires are not as tall as the 20", so the tires look small in the wheel opening. The tubeless match for the 20" tube type rims would be the 22.5" rims.
The 225/70/R19.5 tires are about 32" tall while the 7.50-20 are over 37" tall. Shorter tires will lower your max ground speed.
Mike B
