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Air-Liner Protect: Vittoria's innovative insert for DH / Enduro!

Vittoria is excited to introduce its latest addition to its range of tire inserts: the Air-Liner Protect for Gravity disciplines.

Vittoria Air-Liner Protect (9)

Vittoria, after presenting the version for Cross Country (you can read the test here), came with a product that many were waiting for, namely the renewed version of the "old" Air-Liner, produced by Alessandro Bonarotti and then integrated into Vittoria.

Air-Liner Protect Enduro & Downhill_Technical presentation

This new Air-Liner was conceived and designed entirely in Vittoria with new and innovative features. The first feature that catches the eye is the less invasive nature of the system: now the new Air-Liner Protect is very flattened (T-shaped structure) to favor working the rubber more and coming into action only in the final part.

Why this difference compared to the Light version which maintains a less flat structure?

Because in DH and Enduro robust tires are used, perhaps with a DH casing, which manage to maintain support well in the first part of the tire sinking (the same cannot be said in Cross Country). Having, in the Gravity area, an additional support inside that blocks the work of the tire risks not giving the right feedback, an aspect that professional athletes have often pointed out, who wanted a product that gave "sincere" feedback but also protected the rim in case of violent impacts.

Vittoria Air-Liner Protect (9)
You can see the T-shaped structure with the lower channel matching perfectly with the rim channel

And, unlike its predecessor, the Air-Liner Protect is now available in 29″ and 27,5″, eliminating the need for tedious cutting and zip-tie closures.


2 versions available: Downhill and Enduro. The shape is the same but the density of the structure changes, still remaining among the lightest in the category. The Air-Liner Protect Enduro version incorporates a lighter density foam. This ensures optimal shock absorption and improved handling. On the other hand, the Air-Liner Protect version Downhill boasts higher density foam, meticulously designed to withstand major impacts. The Air-Liner Protect insert Downhill it also proves to be very advantageous for e-bikes.

Vittoria Air-Liner Protect (9)

Air-Liner Protect is available in 2 sizes for enduro (27,5″ and 29″) and 2 sizes for downhill (27,5″ and 29″). All versions are compatible only with tubeless configurations and only with multi-way tubeless valves: a valve is included in the package.


Same dimensions but different densities which lead to different characteristics. The Air-Liner is recommended for sections from 2.4″ to 2.6″ and rims with a 25-35mm channel. If the measurements differ slightly, it can still be assembled but it may take more effort to assemble.

Air-Liner Protect Enduro & Downhill_Technical presentation-2
Different densities between Enduro and DH: below you can read the different response characteristics of the insert

Foam densityBassaHigh
High speed compressionBassaHigh
Weight :125-135 gr175-185 gr


ModelFormatRubberWeight :Price
Air-Liner Protect Enduro27.5 "2.4”–2.6”125 gr.59.95 €  
29 "2.4 –2.6”135 gr.
Air-Liner Protect Downhill27.5 "2.4”–2.6”175 gr.
29 "2.4”–2.6”185 gr.


Additionally, Air-Liner Protect strengthens the tire's lateral stability and bead retention, ensuring tires stay securely in place, even in the most broken-down sections. And let's not forget: Air-Liner Protect does not affect rolling resistance, except for approximately 120/180g more in weight.


Below we can see the comparative tests between the various Air-Liner models, including the old version. Note: 1000N of force is approximately equivalent to 100kg. As we can see, the old Air-Liner was much more protective than these versions, but even too much according to the Vittoria technicians. It is certainly second to none for rim protection but this then affects the driving feedback, creating a muffling effect that makes the tire work poorly. The old Air-Liner, used on the rear in DH/Enduro use, is however still a valid solution.

TEST Airliner victory

You can see how the Light, Enduro and Downhill are very similar to each other: only in the final part are there increases in value. Example: in the DH version there is an increase of approximately 1000N compared to the EN (Enduro) version. It means that, to get to the hoop, you need 100kg more strength. This is a graph referring to pure strength, remember that between the Air-Liner Protect DH and Enduro models there are also differences in the response of the material (we explained this previously).



Now the Vittoria range, as regards inserts, is complete and covers all disciplines. More info to the official website.

We are already testing the 2 inserts and we reserve the right to publish complete tests in the coming months.

Written by

[email protected] I am a fan of everything that has 2 wheels: at a young age I practiced road and track cycling (Italian Allievi champion). At the age of 18 I passed into the cross country competing at national/international level as an Under23. Past Elite, I made the choice to take things more lightly from a training point of view, and my love for gravity disciplines was born, training me as an FCI MTB instructor and guide. Now I have made passion my profession by managing 2 MTB centers on the island of Elba (Bike Center Elba and Elba MTB), creating the FANTAmtb and telling in an ironic but professional way everything that revolves around MTB thanks to 365mountainbike and 365TV (YouTube'PULITI dentro BIKER fuori').


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