Street Hog III Extra Wide Tire 20 x 4 1/4 Diameter: 406 For custom and chopper bikes like the Schwinn New Stingray. This tire fits on all 20″ Classic Cycle rims wider than 50 mm (~1,97 inches) ! But please check frame/fork for clearance! On a 80 mm (~3,15 inches) rim the tire is about 93 mm (~3,66 inches) wide and it will 70 mm (~2,75 inches) protrude over the rim. Depending on the rim width and the air pressure, the tire has a total diameter of approx. 60 cm. 30TPI Weight: ~ 1,67 kg (~3,68 pounds) External Diameter of Street Hog III 20 x 4 1/4 on 82 mm (~3,23 inches) rim is ~560 mm (~22,05 inches) – May vary because of pressure. If you assemble the tire on wide rims not to put more pressure than 30 PSI. It could blast.