High quality and durable rubber material with grooved surface provides an excellent grip,explosion-proof and pressure resistant,resistant to abrasion Lightweight and durable. Product Details, weight - 1.5 pounds, outer diameter - 8.5 inches, inner diameter - 5.5 inches, width - 2 inches. Perfect for the width of the wheel hub is between 1.33 and 1.34 inches and the outer diameter of the wheel hub is between 6.49 and 6.50 inches. Customized for 8.5 inches Electric Scooter Xiaomi M365’s / GOTRAX GXL V2 wheels. Easy installation and operation:no need to inflate,No more need for patches, inner tube, bicycle pump,convenient to use no need worry about puncture broken.Hot water softening,adjusted flexibly and fixed tightly is over. Anti-skidding pattern makes it can be used in snowy and rainy days. Please see pictures to confirm size and compatibility before order. If you have any problem,please feel free to contact us. Product Details, weight - 1.5 pounds, outer diameter - 8.5 inches, inner diameter - 5.5 inches, width - 2 inches. Perfect for the width of the wheel hub is between 1.33 and 1.34 inches and the outer diameter of the wheel hub is between 6.49 and 6.50 inches. Customized for 8.5 inches Electric Scooter Xiaomi M365’s / GOTRAX GXL V2 wheels.