★ Please check the size strictly！There are many tire specifications, please be sure to check the size according to the picture and text description, otherwise it is easy to buy wrong：1. If your old tire is a solid tire, please check the side of the old tire, if the 22x1 3/8 mark exists, it is suitable for installation. ( 22x1 3/8 is different from 22x1.75, not universal.)2. If the old tire is a pneumatic tire and the 22x1 3/8 mark on the side of the tire exists, you need to measure the inner width of the rim. If the inner width of the rim is 0.75-0.87 inches, it is suitable for installation. Pneumatic tires can be replaced with solid tires and no longer need to be inflated.3. If there is no specification mark on the side of the tire, you need to measure the diameter of the rim and the inner width of the rim. If the diameter of the rim is 20-20.5 inches and the inner width of the rim is 0.75-0.87 inches, it is suitable for installation. Please check the rim size description for the pictures on this page.This tire is only suitable for manual wheelchair installation, not for electric wheelchairs.Tire material: PU (polyurethane). This is a solid tire, not a pneumatic tire. Solid tires do not need to be inflated and cannot be punctured. Solid tires do not distinguish between inner and outer tires, and are one-piece tires. Equipped with an installation tool, you can install it according to the method of the video on this page. If possible, soak the tires in hot water for 20 minutes to reduce the difficulty of installation.
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