Vittoria Air-Liner MTB Tubeless Tire Inserts (for 1.9 - 2.25in XC/Marathon tubeless tires)

The original Air-Liner system for tubeless stability, impact protection, and compatibility with 26/27.5/29 wheels

Punctures are a fact of life, but the Air-Liner MTB keeps a mid-run flat from imposing an insurmountable time penalty, an auto-DNF, or a hike-a-bike to the transition. The Air-Liner’s high-density structure keeps your tyre rideable for up to an hour after a flat – enough time to clear a stage or hustle back to the trailhead. Your ambitions don’t have to deflate just because your tyre did.

The Air-Liner isn’t just an emergency flat solution – it also helps prevent punctures by preventing rim strikes. As it compresses, the polymer material ramps-up like a shock. Trail chatter is muted, root lattices are smoothed, and the big hits and square edges of rock gardens are cushioned. The Air-Liner’s cross-section keeps the tyre’s contact surface fluid and flexible, but it also increases lateral stability by buttressing the sidewalls.

Technology Explained:

A high-density polymer structure gives the Air-Liner MTB all the qualities of a good shock: it mutes chatter and ramps up under big impacts, increasing ride comfort and preventing rim strikes. It also acts as a run-flat for up to an hour if you do puncture, and it has an install life of 2,000 hours. The insert’s cross section is compatible with all tubeless valves, keeps the tread lively, and reinforces lateral stability. The Air-Liner is compatible with all tubeless and tubeless-ready mountain bike tyres and ammonia-free sealant.

Specifications Chart