Vittoria Air-Liner Protect Downhill Foam Tube Insert

Tire Insert

Developed on World Cup Downhill tracks, offering unparalleled protection and stability in the most demanding environments.
The Air-Liner Protect Downhill tire insert is derived from the most demanding downhill race tracks of the UCI Mountain Bike World Series.

Manufactured from high-density polymer foam to ensure product longevity, allowing riders to confidently tackle even the most demanding trails and terrains. It forms a robust barrier between the rim and tire, providing unprecedented protection against punctures, sidewall cuts, and pinch flats.

Compared to the enduro version, the Air-Liner Protect Downhill version features higher density foam, precisely engineered to withstand the relentless forces encountered during high-speed downhill descents. Unlike its predecessors, the Air-Liner Protect Downhill is supplied as a complete loop, eliminating the need for tedious cutting and joining.

You no longer need to fear the power of jagged rocks or treacherous roots, as Air-Liner Protect Downhill is always there to protect you.

Air-Liner Protect Downhill is made from a patented foam material designed specifically for downhill applications. This material is compatible with any type of sealant. Available in two wheel sizes (27.5" and 29"), each compatible with tire sizes from 2.4" to 2.6". Must be used with a tubeless setup (not compatible with inner tubes) and only with multi-purpose tubeless valves—one (40mm) valve is included in the package.

Tire Size Rim Width Weight Valve Length e-Bike Compatibility
27.5x2.4-2.6 28-35mm 175g 40mm Yes
29x2.4-2.6 28-35mm 185g 40mm Yes

01
Impact Protection
Air-Liner Protect shields the rim from severe impacts while reducing the risk of snakebites.
Its "T" shape creates a barrier between the rim edge and the inside of the tire.

02
High-Speed Performance
Air-Liner Protect does not affect the rolling performance of the tire.
Under air pressure, the insert collapses onto the rim, forming a seal that can withstand even the strongest impacts.
With Air-Liner Protect, there is no foreign object rolling inside the tire.

03
Lateral Stability
Air-Liner Protect provides support for the tire sidewall under cornering loads.
You can enter corners at full speed: no need to worry about the tire coming off the rim.
Air-Liner Protect also enhances the sidewall's resistance to cuts and punctures.

04
Large Air Volume
Thanks to its "T" shape, Air-Liner Protect allows for a larger air volume within the tire.
This means you can lower tire pressure for extra grip without worrying about the tire coming off the rim or damaging the rim.

(This description is a translated version; please refer to the official website for specific information.)