Material: 210D Oxford cloth. The tire cover is suitable for tires with a diameter less than 80 cm, suitable for 19-23 inch tires (please check the tire size before purchasing). Applicable tire size: L (diameter 80CM/31in) tire cover size: 124*69CM, suitable for 19-23 inch tires. Set of 4 tire bags, you can store both summer and winter tires, sturdy and durable for long-term use. Made of 210D Oxford cloth, waterproof and dustproof, it is tear-resistant and can withstand strong pulling forces without deformation. Labeled, to distinguish which tire corresponds to which side for easy wheel recognition, keep the spare tire clean. With straps on both sides for reinforcement, with a handle and retractable cord, can be freely adjusted in size, for easy removal and transport. Car tire diameter selection: L: tire diameter less than 80 cm S: tire diameter less than 66 cm. Tire diameter calculation method: For example: tire specifications 195/55 R15 85 V. Diameter conversion method: diameter (cm) = width AR/500 + width 2.54. Formula: diameter = W AR/500 + 2.54 x R = 195 x 55/500 + 2.54 x 15 = 59.55. According to the calculation, the small size is suitable.