The Michelin Airstop 21-inch standard inner tube is designed for dependable performance in compatible motorcycle, scooter, and powersports applications. This tube features a TR-4 center/side metal valve configuration and is manufactured by Michelin for riders and technicians who require a durable, well-balanced replacement tube. Vendor part number 70151 identifies this model for ordering and fitment reference.
Fitment: Intended for wheels and tires that specify a 21-inch standard inner tube with a TR-4 center/side metal valve. Always compare the tire size, valve location, valve type, and vehicle manufacturer requirements before installation to confirm compatibility. The tube should be installed by a qualified technician using proper mounting procedures to help prevent pinching or valve damage.
Construction: Michelin Airstop tubes place the splice opposite the valve, helping promote a more balanced tube during installation and use. The overlap splice is stronger than the butt splice commonly used in many other inner tubes, supporting reliable service in demanding riding conditions. Michelin Airstop inner tubes are selected by customers seeking high-quality construction and consistent fit in compatible applications.
Features:
- Size: 21-inch standard inner tube
- Model: Airstop
- Brand: Michelin
- Manufacturer part number: 70151
- Vendor part number: 70151
- Valve type: TR-4 center/side metal valve
- Splice design: Overlap splice for increased strength compared with conventional butt splices
- Balance: Splice positioned opposite the valve for improved tube balance
- Fitment: Compatible with applications requiring a 21-inch standard tube with a TR-4 center/side metal valve