PUNCTURE-PROOF & INFLATE-FREE: The solid air-less tire is made of quality polyurethane, Flat-free tires perform like a pneumatic tire, but eliminate downtime,PARAMETERS: Tire Model: 20x2.0"; Tire diameter: 19.5" ; Tire Width: 1.9" ; Hub Type: Centered Hub; Hub Length: 2.45" (2-1/2"); Pre-assembled 3/4" bearings(come with 5/8" bearing),HEAVY-DUTY WHEEL: Tires are made from premium hard materials that have high resistance to impact cracks. Maximum load capacity of 250 LBS,UNIVERSAL FIT: Before purchasing, please check the existing tire sidewall type and measure the tire value to ensure that the replacement is suitable