Huck Norris liner could be end of tubeless punctures

Cellular foam insert designed to act as a protective barrier for rubber and rim

Gear Tires
The cellular foam liner  goes inside the tire to act as a protective barrier for rubber and rim.

The cellular foam liner goes inside the tire to act as a protective barrier for rubber and rim.

Arguably the No. 1 hindrance slowing greater adoption of plus tires is the lose-lose proposition between weight and puncture protection. Many of the 2.8” to 3.0” tires currently on the market are either too heavy or too flimsy to be ridden hard without fear of failure. And frankly bad things still happen with standard tubeless tires.

Could the answer be… Huck Norris?

Simply slip the liner between rim and tire.

Simply slip the liner between rim and tire.

The team behind this small start-up from Finland got tired of seeing rides and races wrecked by tubeless tire punctures and came up with the idea of cellular foam liner that goes inside the tire to act as a protective barrier for rubber and rim. Once inserted it lightly touches the sidewalls, which is claimed to aid with tubeless set-up but not affect rolling performance. Note that you will need to add a little extra sealant, as the foam will soak up some of the liquid.

Claimed weight for a size small strip is 70 grams for 27.5 and 77 grams for a 29er liner.

Claimed weight for a size small strip is 70 grams for 27.5 and 77 grams for a 29er liner.

The strips come in three widths (50mm, 55mm, and 60mm) and are designed to interface with rim widths from 21mm to 45mm. Claimed weight for a size small strip is 70 grams for 27.5 and 77 grams for a 29er liner. The strips can also be cut down to fit 26” wheels. Cost is 69 euro (or about $77US). To learn more check out the install demo video below and visit

What do you think? Is Huck Norris the answer to our puncture problems?

About the author: Jason Sumner

An avid cyclist, Jason Sumner has been writing about two-wheeled pursuits of all kinds since 1999. He’s covered the Olympics, Tour de France, MTB world champs, and dozens of other international cycling events. He also likes to throw himself into the fray, penning first-person accounts of cycling adventures all over the globe. Sumner has also done extensive gear testing and is the author of the cycling guide book "75 Classic Rides: Colorado." When not writing or riding, the native Coloradoan can be found enjoying life with his wife Lisa and kids Cora and Tommy in and around their home in the MTB Mecca of Crested Butte.

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  • El says:

    Everyone’s an expert online. But bogus on the trail!

  • chuck says:

    So much light and puncture resistant. Just get a tube, patch kit and avoid the whole mess (and expense).

  • Juan says:

    Cool idea. Haters gonna hate, as always. Back to your 7,000 carbon China bikes.

  • justin says:

    Are people really having problems with flats like this. The weight penalty and rolling resistance seem like they negate the tubeless tire benefits. If this actually helps, get the price down to $20 per pair and we’d be in business. $70/per is ludicrous.

  • Ridge says:

    I’m just envisioning in a couple of months….

    One huge 10 pound Stan’s booger totally encompassing the entire inside of the wheel.

  • ratt says:

    Really simple test to see if this works or not and how effective is. Mount it to a wheel and drop it from 5′ with 200 lbs on it, keep lowering the pressure till it snake bites.Compare to non foam tire, I still bet a 2 ply DH casing will beat both. As a control you may need to add volume spacers to the other control tires because the foam maybe just causing a more progressive ramp up like we do to our forks and shock with volume reducers to help prevent bottom out. From my couch I vote thumbs down.

  • GuyOnMTB says:

    Stopping punctures is secondary in its design. The Huck Norris was designed to provide protection against rim strikes. The inventor even divulges this.

  • derby says:

    Far better idea than ProCore. At least for carbon fiber rims. Much lighter, fits any rim. Beginner DH riders could not lower tire pressures, as ProCore claims is possible, and ignorantly rely on a hard inner ProCore tire to “protect” their carbon DH rims from excessive rim compression flex from sharp hits or suspension bottoming.

  • Grandsalmon says:

    Hmmmmmm……..old closed cell mattress pad in closet, mat knife in drawer, “template” from picture ???
    I do like how their merchandise placard doubles as a front fender -that’s very cool, and very Finnish

  • Kiteboardkid says:

    Time will tell on this whether it actually is any real benefit, seems a complete waste of time if your want to run tubeless and save weight.

    This is what we’ve been doing for years and it works really well. Buy the lightest inner tubes you can get preferably with removable valves, remove valve and add 60ml (60g in weight) of Latex sealant. Fit inner tube into tyre and pump up. A lot less mess and the sealant never seems to dry out like it did when we ran tubeless, which means you add more and more sealant over time adding more and more weight.
    Tip: Don’t run your tyres so low that you get pinch punctures or damage the rim. I can’t remember the last time I had a puncture and it’s quick and simple to change tyres without the mess. I gave up running tubeless years ago after burping issues on heavy landings or cornering hard. This method works really well for us 🙂

  • Willie says:

    Tires + Tubes…
    If it ain’t broke, don’t fix it.

  • mort brkr says:

    69 euros is nothing. Carry over the 9, subtract the six. Divide by 2…$891 US! A Bargain.

  • centralcoastkid says:

    huh ?

  • Utah John says:

    Traction. You can’t run a tube at as low a pressures as tubeless, the traction difference is huge. I pinch flat the sidewalls, so have to run a higher pressure than I like to to prevent it. This will give me the best of both.

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