The tubeless system is, without question, one of the best innovations in modern cycling. Once you’ve experienced riding without inner tubes—lower pressure, better grip, and the almost magical ability of sealant to close a puncture after a thorn—you rarely want to go back to tubes. In summer, it’s a dream: mount it, inflate it, ride.
But then winter comes. Temperatures drop to freezing, morning fog turns into frost, and suddenly you realize that your once-reliable setup starts misbehaving. Pressure disappears, the tyre feels “floaty” in corners, and the sealant that worked like magic in July suddenly behaves… strangely.
Does tubeless work in winter? Absolutely. I’d even say that in winter—when fixing a flat with frozen fingers is the last thing you want—tubeless is even more important than in summer. But there’s a catch. Winter changes the rules of the game. Physics and chemistry behave differently in the cold, and if you prepare your winter tubeless setup the same way as a summer one, you’re asking for trouble.
In this article, we’ll look at what really happens inside your tyres when temperatures drop below freezing, and we’ll bust a few myths that circulate among cyclists. We’ll also take a closer look at our tyres—because with them, one specific rule applies. Ignore it, and you simply won’t build a functional tubeless setup.
1. Pressure Alchemy: Why Frost Steals Your Air
Let’s start with the most important thing: pressure. Everyone knows that in winter “it rolls slower” and that air “shrinks.” But for a tubeless system, this is far more critical than for a tube.
Imagine a classic scenario: your bike is in your apartment or a heated garage at a comfortable 20 °C. You inflate to your usual pressures—the same ones you’ve been riding all summer. Then you head outside, where it’s –5 °C. What happens?
Physics is unforgiving. As air cools, it contracts. But it’s not just about air “getting thinner.” The real culprit is moisture. The air you pumped into your tyre at home (or, heaven forbid, from a CO₂ cartridge) contains water vapor. In warm conditions, it’s a gas that contributes to pressure. As soon as you ride into freezing temperatures, that vapor condenses into water—or freezes directly into microscopic ice crystals. Liquid water or ice takes up far less volume than vapor.
The result? Your pressure doesn’t just drop a little. It can easily drop by 0.3 to 0.4 bar (4–6 PSI). If you normally run 2 bar on a gravel bike, you suddenly find yourself at 1.6. That’s right at the limit where, in a harder corner, the tyre can “burp,” lose the remaining air, and in the worst case, damage the rim.
What to do about it? (A Winter Inflation Hack)
Forget feel and summer habits.
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Overinflate: If you inflate indoors and then ride into freezing temperatures, add about +0.3 bar (4–5 PSI) more than your target riding pressure.
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Check outside: The best method is to leave the bike outside (or on a balcony) for about 15 minutes to cool down completely, and only then fine-tune the pressure. That’s when you’re measuring reality.
2. Not All Rubber Is the Same: The “Compound” Trap
This is where most mistakes happen. Many riders think that a “soft compound” automatically means good winter performance. They grab a downhill tyre because it’s soft and sticky, head out onto snow—and then wonder why it’s slippery.
The problem lies in what’s called the glass transition temperature. Every rubber compound hardens at a certain temperature—it changes from a flexible material into something resembling hard plastic or glass. Summer compounds (even soft racing ones) are designed to work at 10 °C and above. Below freezing, they stiffen up. Hard rubber can’t adapt to the micro-roughness of the surface. It slides like a hockey puck on ice.
If you want to ride safely in winter, you need a compound that contains silica (silicon dioxide) and is chemically tuned to remain flexible even in freezing conditions.
A Rubena Tyres Specific
If you’re looking at Czech-made tyres, pay close attention to the labeling. Catalogs contain various names, and it’s easy to get confused.
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What to look for: A compound labeled Silica Winter Compound (SWC). You’ll find it on models like Froster or Gripper Ice. This compound is specifically developed for freezing temperatures.
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What to avoid: Soft compounds designed for city or road bikes. These compounds harden much sooner in cold conditions than true winter-specific tyres.
3. Sealant in Winter: A Deceptive Slurry
Sealant is the blood of your tubeless system. And just like blood, sealant changes viscosity in the cold. Most sealants are based on latex and water, with added glycol as an antifreeze component.
Manufacturers often claim their sealant works down to –20 °C—but reality is more nuanced.
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Thickening: Even if sealant doesn’t freeze solid, it thickens in the cold. “Milk” turns into “yogurt.” When you puncture, that yogurt flows slowly. Before it reaches the hole and seals it, you’ll lose far more pressure than in summer.
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Drying out: This sounds counterintuitive—there’s snow and moisture everywhere, so why would sealant dry out? Because cold air has very low absolute humidity. And more importantly, you park your bike indoors. Temperature changes and dry indoor air pull moisture out of the sealant.
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Latex clumps: Old sealant in winter loves to form lumps. The clear liquid (glycol) separates—it won’t freeze, but it won’t seal anything either—while the latex coagulates into a rubbery ball (“hedgehog”) that just rattles around inside your tyre.
Advice: Don’t rely on sealant that’s been in your tyres since summer. Before winter, pour it out, clean the tyre, and add fresh sealant. If you expect extreme cold (below –10 °C), choose sealants specifically formulated for winter, with a higher antifreeze content.
4. Salt Is Worth Its Weight in Gold? Not for Your Bike.
Winter roads are full of brine (sodium chloride or even more aggressive calcium chloride). Salt is a silent killer.
For tubeless systems, the biggest risk is to rims and nipples. Sealant keeps the inside of the rim humid. Add salty water from the outside, and you’ve created a perfect electrolyte. This triggers galvanic corrosion.
An aluminum rim with brass nipples? Or carbon with aluminum? That’s a battery. Salt accelerates the process so much that nipples can corrode and fail within a single season.
This is where tyres with Textra technology matter. That extra fabric layer in the sidewall also acts as a shield against salt. While ordinary rubber or cotton casings (used in expensive racing tyres) can absorb salt and start degrading, the dense nylon mesh of Textra prevents salt from reaching the internal structure.
Post-Ride Maintenance
Rinse your bike with cold water. Why not hot? Hot water accelerates chemical reactions involving salt. A cold shower is healthier for your salt-covered bike.
5. The Final Cheat Sheet: Winter Tubeless Setup at a Glance
Don’t want to remember all of this? Here’s your winter tubeless to-do list:
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Tyres: Buy true winter tyres with a silica-based compound (SWC). If you choose Rubena, look for Textra technology—it’s the only way to get an affordable and functional winter tubeless setup.
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Sealant: Dump the old stuff and add fresh sealant. Topping up old sealant doesn’t work.
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Pressure: Inflate more. If you pump indoors, add about +0.3 bar compared to your desired outdoor pressure.
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Rims: If possible, mount winter tyres on wider rims. Lower winter pressures are more stable on wider rims and reduce the risk of the tyre unseating in corners.
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Cleaning: Rinse off salt immediately. Don’t let it dry.
Winter cycling is beautiful. Silence, empty trails, crunching snow under your tyres. And with a properly set up tubeless system, it’s also safe and worry-free—no flats. So swap tyres, add pressure, and head out! ❄️🚴♂️