Air-Liner, the revolutionary performance insert for tubeless mtb tires


Vittoria is excited to announce the launch of their revolutionary performance insert for tubeless mountain bike tires – the Air-Liner. The Air-Liner destroys the traditional compromise of stability vs. grip, and allows your tires to remain stable, grippy, and controlled, even at low pressures.

It used to be that riders had to choose between high-speed tire stability, and ultimate grip. The reason was, the air pressure inside the tire was the only thing preventing the tire from bottoming out on the rim. While riders wanted this stability and protection, they also wanted traction and grip, which meant the tire needed to be soft enough to deform to the terrain. Through casing and compound advancements, huge gains in stability and grip have been made, however, one thing has remained the same… the air in the tire.

The Air-Liner is a high-quality polymer insert, which replaces a portion of the air volume in the tire. This trait, combined with the shape, provides a tunable system that gives a progressive feel. Gone are the days of bottoming your rim on a sharp hit in the trail, only to have your tire rebound sharply. Because the insert is working with the remaining air in the tire, impacts are absorbed, much like in a suspension system. This protects both the tire and wheel, which traditional suspension does not.


The Air-Liner is designed using a round cross section, with channels on the top and bottom. The top channel provides room for the tunable air chamber that sits directly beneath the tire tread. Upon impact, the corner edges of the channel flex first, and progressively build to the thicker portion, as the tire is compressed. This allows the tread to remain flexible, which increases traction, without sacrificing impact resistance.

The bottom channel allows for easy fine-tuning of the air chamber, and allows for full compatibility of all valve core styles. The round cross-section shape mimics the natural shape of the tire, and supports a greater contact area within the sidewalls of the tire casing. Side-to-side tire stability is increased, yet the tread remains soft and grippy. This improves cornering, climbing, and braking performance.

Air-Liner is made from a proprietary high-density polymer material, specifically designed for this application. This highly durable polymer material has been tested to a projected life of 2000 hours under normal riding. Run-flat downhill performance has been proven by pro-riders around the world. Air-Liner is completely water-proof, and does not absorb tire sealant.

Fitment and prices

The insert comes in 4 widths (Small, Medium, Large and Extra Large):








Cross-Country / Marathon

from 1.9” to 2.2”

€ 69.00

90 g


All Mountain / Enduro

from 2.25” to 2.5”

€ 72.50

165 g


Enduro / Plus

from 2.5” to 2.7”

€ 73.50

200 g


Plus / Fat

from 2.7” to 4.0”

€ 75.00 

234 g

Air-Liner is compatible with any wheel diameter up to 29” (700c), and is designed to be trimmed during install for a perfect fitment around your wheel.

Watch how easy it is to mount Air-Liner here