Gizmo vs Gecko

Dogsitting Gizmo, he found a Gecko in the screen room. He just had to play with it, and the Gecko won?

Wheels and tires

Orginal (spare) and New wheel and tire.

Picked them up yesterday at Discount Tire. Quite a bit of difference between the 600-16 bias ply and the low profile 205/40 Radial tires. They both weigh 40 pounds, so there is no unsprung weight advantage.
Comparison Old/New:
86/73.5 inch circumference.
736/862 revolutions per mile.
2782/3258 engine RPM at 60 MPH in 4th gear SWAG calculation.
4.5/8 inch tread width on the road.