For tubeless road tires
Lightweight tubeless tire protection
It gets you home. It allows run-flat use in the event of a puncture.
Tubeless Multiway Valve included.

Don't let punctures stop you!
Air-Liner Road provides protection and impact absorption while maintaining tubeless sealing at low pressures. If you get a puncture and lose air pressure, Air-Liner Road lets you keep riding in run-flat mode long enough to get home. The insert increases tubeless security by preventing the tire from sagging—the tire stays on the rim even if you have a puncture! Vittoria Air-Liner Road is compatible with all tubeless-ready road bike tires on the market and offers the same performance regardless of tire brand or model. The lightweight insert material does not absorb sealant and does not hinder its function. The tubeless Multiway Valves supplied with Air-Liner Road feature larger-than-normal holes to allow for easy air and sealant flow.

The Air-Liner Road package contains:

An Air-Liner Road insert
Two Multiway tubeless valves

Measurements and compatibility:

Air-Liner Road Size Compatible Clincher Sizes Recommended Clincher Size Inner Rim Width
S 700x23/26 mm 25 mm Max 21 mm
M 700x27/29 mm 28 mm Max 23 mm
L 700x30/32 mm 30 mm Max 26 mm