The Michelin Airstop Standard Inner Tube is designed for 21-inch applications requiring a dependable TR-4 center metal valve. Manufactured by Michelin and identified by manufacturer and vendor part number 38637, this tube is built for riders and equipment owners who expect consistent performance, reliable air retention, and durable construction.
Fitment: Fits compatible 21-inch tires using a TR-4 center metal valve configuration. Verify the tire and wheel specifications before installation to ensure proper application and valve compatibility.
Balanced Design: The splice is positioned opposite the valve to help provide a more balanced tube inside the tire. This arrangement supports smoother installation and helps promote consistent performance during use.
Reinforced Splice: Michelin uses an overlap splice rather than the butt splice commonly found in many other inner tubes. The overlap construction is designed to provide added splice strength and durability.
Trusted Construction: Michelin Airstop tubes are selected by users seeking high-quality replacement components for compatible powersports, motorcycle, and equipment applications. Install according to the tire manufacturer’s recommendations and inspect the tube, tire, and rim before use.
Features:
- Size: 21-inch standard inner tube
- Model: Airstop Standard
- Valve: TR-4 center metal valve
- Brand: Michelin
- Manufacturer part number: 38637
- Vendor part number: 38637
- Balanced construction: Splice positioned opposite the valve
- Overlap splice: Stronger construction than a conventional butt splice
- Fitment: Compatible with 21-inch tires designed for a TR-4 center metal valve