20", 406

This presta tube in particular fits tires from 28mm to 32mm. Even though it's pitched as the right tube for the Continental Gran Prix, it's fills the tire completely. This means take care when putting this tube in to avoid pinch flats. All Continental tubes are seamless and mold-cured (vulcanized) to ensure uniform roundness and improved reliability at the valve stem. Each and every tube passes a stringent 100% quality control inspection

Designed for an 18" wheel, this tube also works very well for narrow 20" (406) applications. We've used this tube for years in Gran Prix and Stelvio tires on narrow rims. In presta only. Many guys have gone with this over the years because it seemed to be the only tube narrow enough to handle the 28mm 406 tires. The Continental tubes were too fat even though they stated they were for the Gran Prix. However, the Schwalbe tubes (AV6 & SV6) fit both the Gran Prix and Durano/Stelvio very nicely.

Quality tubes in every size for 406 and both presta and schrader.

Need a little extra protection? We stock puncture resistant 20" tubes for a few of the larger sizes and schrader valves. These tubes are basically three times as thick as a normal weight tube. In many cases, you can make your bent virtually impregnable to flats with these tubes, a tire liner, and a tire like a Marathon or Marathon Plus

The SportContact in a 28mm turns any bike into a racer. All this added speed for your bike with zero detriment to puncture protection and reliability! Extremely fine and strong carcass plies, SafetySystem and puncture protection are all integral features of the Contact tire family. 80 - 85 psi recommended pressure.