They are Pegasus 23” “Phat Daddies” wheel/tire combo. They’re too big to look anything but ridiculous on a 1:25 scale model. IMO, they only look slightly ridiculous on the right 1:24 scale car. Luckily for me, murdering out a GSX is ridiculous enough to even things out. ?
Also, thank you to everyone for the kind, humbling comments. Belonging to a forum filled with such fine folks and fellow enthusiasts adds another level of joy to this wonderful hobby. Namaste.