Your tongue jack wheel needs stability too, the Donut by SnapPad, a sturdy wheel dock that locks your trailer's tongue jack wheel in place and stops it from shifting, rolling, sliding, or sinking while parked. Made in the USA from durable recycled rubber tires (just like SnapPads), the Donut's two-engineered docking slots can fit standard tongue jack wheels up to 8" X 2-1/4". For up to 8" tongue jack wheels1-3/4" thick - adds about 1/2" of height2-Year Manufacturers Warranty