Michelin's Airstop name says it all. Their Airstop tubes use a proprietary butyl rubber that holds pressure longer so you won't have to top off your tires so much. These fine tubes are reinforced at the valve, too.
| Option | Barcode | Manufacturer's Part Number | Vendor Number |
|---|---|---|---|
| 700 x 35-47c (Schrader valve) | 00086699856814 | 85681 | QBP-TU8140 |
| 700 x 35-47c (40mm Presta valve) | 00086699217363 | 21736 | QBP-TU8141 |