Lot of 4 HERKIMER 1950-60's Aluminum Rim Wheel Tire Slicks for OK CUB CART GO KART HOT ROD Tether Car. Outside diameter 1-1/4" x width 3/8"  ID 5/8"  Axle size is 0.11" Original old factory stock. A little dusty. 

Rim/hub with rim OD 3/4" without rim 5/8"