The Michelin Airstop Heavy-Duty Inner Tube is designed for 21-inch tire applications requiring dependable performance and enhanced durability. This model uses a TR-4 center metal valve for secure inflation and compatibility with tires that specify this valve configuration. Manufacturer and vendor part number 40953 identifies this Michelin replacement tube.
Its splice is positioned opposite the valve to help promote a more balanced tube during installation and operation. The overlap splice design provides greater strength than the butt splice commonly used in many standard inner tubes, making it a suitable choice for demanding riding and service conditions. Michelin Airstop tubes are selected by riders and technicians seeking high-quality replacement components.
Fitment: Intended for 21-inch tires that require a TR-4 center metal valve inner tube. Confirm tire specifications, valve placement, and application requirements before installation. The Michelin brand, Airstop construction, heavy-duty design, and part number 40953 make this tube a reliable replacement for compatible motorcycle and powersports tire assemblies.
Features:
- Size: 21-inch inner tube for compatible tire applications
- Model: Airstop Heavy-Duty with TR-4 center metal valve
- Brand: Michelin
- Manufacturer part number: 40953
- Vendor part number: 40953
- Splice design: Overlap splice for increased strength compared with a traditional butt splice
- Valve placement: Splice positioned opposite the valve to help provide a more balanced tube
- Fitment: For 21-inch tires requiring a TR-4 center metal valve inner tube