|Modern Green 24" Tractor Garden Spinner. Each Tractor Yard Spinner has four independently mounted wheels that spin in opposite derections, Modern Green Tractor Garden Spinners will race for miles without need of fuel or a tune-up while creating a mesmerizing stroboscopic effect. These Tractor Spinner are made with fade-resistant Solar Max and heavy-duty hardware, . Size 24" X 20" / deameter: 12" / Made with Solar Max fabric. Assembly Instructions.