Each time you go to a tyre shop or a gas station to top up the tyre pressure in your vehicle’s tyres, what the attendant fills into the tyre is normal compressed air. But what exactly does compressed air contain? Compressed air is made up of 78% nitrogen, about 20-21% oxygen, and the balance one percent consists of CO2, and tiny concentrations of gases such as neon, argon and water vapour.

 When you specifically fill nitrogen gas into the vehicle's tyres, then you should have 100% dry nitrogen in your tyre. Dry nitrogen denotes that no        moisture content or any other gases are present in the tyre.

 Jay Chakraborty, who recently bought a second hand car, says, “After I bought my car, I changed the tyres and I’ve heard so many people talk about  how good nitrogen has been for them that I decided to get my new tyres filled with nitrogen air. The car feels a lot better on bumpy roads, and I don’t  have to worry about checking tyre pressure every week.”

Benefits of nitrogen Vs compressed air

Nitrogen as a gas is made up of big molecules, whereas oxygen molecules are much smaller in size compared to nitrogen molecules. When compressed air is put into a vehicle’s tyres, the moisture in the tyre seeps through the rubber over time and evaporates quicker as its molecules are smaller in size. But as nitrogen molecules are bigger in size, they do not permeate the tyres rubber so easily and hence will stay in the tyre for a longer duration. This means that your vehicle’s tyres will lose less pressure over time compared to regular compressed air filled tyres.

For example: An inactive vehicle, whose tyres are filled with normal compressed air will lose tyre pressure every week. But a 100% nitrogen-filled tyre will lose tyre pressure a lot slower and won’t need to be topped up as frequently. 

Titus Remedios, “I filled nitrogen in the new tyres that  I purchased for my Maruti Ecco in June 2019. That time the tyre pressure filled with nitrogen was 35Psi. I use the car once a week and after the lockdown, the car hadn’t been used in months. I recently went back in October 2020 to the place where I had filled the nitrogen in the car tyres and the tyre pressure after 14 months had only dropped to 22Psi. .

Another point to note, nitrogen filled tyres get a green or blue colour valve cap. This is a universal symbol that your vehicle's tyres are filled with nitrogen and not compressed air.

Is Nitrogen right for you?

Over-inflation and under inflation of tyres make a major difference on the race track. But on your normal city road does it make a huge difference? Under-inflated tyres normally lead to less mileage, uneven wear on the tyre treads and more tyre wear and tear overall. Over inflated tyres run the risk of burning out the contact patch on the tyre too quickly, while adding more bounce vs grip to a vehicle's stability. In hot climate conditions, your vehicle's tyre pressure can jump up tremendously. Highway running speeds coupled with a harsh sun beating down, can lead to a  tear in the tyre or in extreme conditions, a tyre bursting. This is where nitrogen-filled tyres shine the most. Due to their molecular build, nitrogen molecules stay at a constant temperature in a tyre. So even if the temperature outside decreases or increases, the nirotgen in the tyre will remain the same. That is why race cars and racing motorcycles only use 100% nitrogen in their tyres all the time.

Now we are all not professional racers, but we do commute on a daily basis and even go for the occasional weekend drive out of the city for some sightseeing and relaxation. Will filling nitrogen in your vehicle's tyre help you? There are many who swear by nitrogen-filled tyres and an equal amount who feel that regular compressed air works just fine.

Personal tyre maintenance

If you are someone who keeps a check on the vehicles tyre pressure weekly and tops up the air when needed, you won’t need nitrogen filled into your vehicles tyre. However, if you are someone who tops air pressure once a month or once in two months, then filling nitrogen in your vehicle's tyres will help you reap the benefits of it. If you constantly make long highway trips and most of your time is spent behind the wheel, then filling nitrogen in your vehicle's tyres will be a boon.

Yash Ramrakhyani from Palghar runs a big tyre shop which sells Apollo, Bridgestone, Continental, Michelin and Yokohama tyres for every vehicle from a scooter to a heavy duty tempo. He says, “I get an average of 300 customers a year who want nitrogen filled in their vehicle’s tyres. There was a big local demand in the area for nitrogen-filled tyres, hence my father and me invested in the nitrogen unit. Tyres don't get hot, and nitrogen level doesn't go down so fast is what I have heard from customers as feedback, but the fact that people think nitrogen levels in the tyre doesn't go down is false. Even nitrogen-filled tyres have to be checked for tyre pressure once a month.

Nitrogen myths busted

Myth 1: Your vehicle's mileage will increase.

Truth: Your vehicle’s mileage depends on a lot of factors, tyres being just one small part of that equation. Having nitrogen filled tyres only gives you the benefit of having a most constant tyre pressure. However compressed air and nitrogen filled tyres both will loose pressure after a certain amount of time.

Myth 2: Your vehicle's comfort will be better, it will be soft on bumps.

Truth: Compressed air or nitrogen filled tyres will react the same way when on bumpy roads. It is the rubber compound and the type of tyres that you have that will make a difference in the ride or drive quality. As long as you maintain the right air pressure in your vehicle's tyres, you’ll be good.

Myth 3: You won’t have to fill up the tyre pressure as frequently.

Truth: Well this is true. Nitrogen-filled tyres will retain the pressure in your vehicle's tyre for a longer time duration compared to tyres filled with compressed air. However, even nitrogen-filled tyres loose pressure over time and you have to get the pressure checked and topped up from time to time.

Myth 4: Your vehicle's tyre will last longer

Truth: The tyre on your vehicle rely on you to make sure you maintain the recommended air pressure inorder for it to do its job properly. Under inflated and over inflated tyres will wear out faster when compared to tyres that have been properly maintained.

Myth 5: The rims on your vehicle won't rust

Truth: There is some amount of truth in this. As nitrogen-filled tyres contain less or no water vapour, the moisture content in the tyre is less. Less moisture equals to less rust on the inside of the wheel. But that doesn’t stop the rest of the wheel from rusting due to everyday washing and climate conditions.

Myth 6: There are few tyre shops / fuel pumps that offer nitrogen.

Truth: Compressed air is mostly nitrogen gas. So even if you have nitrogen-filled tyres, but you’re running low on tyre pressure and there’s no nitrogen filling station around, you can still fill normal compressed air. It will not have any major impact on your vehicle's tyres. Maintaining the right tyre pressure is key.

The catch

The nitrogen that you get filled in your vehicle's tyres is not a 100% or even 99% pure nitrogen. A brand new or even an old tyre once deflated has some amount of air inside it. It is the atmospheric air that's already there all around us. So unless you drain all the air in the tyre out and refill it nitrogen and drain the tyre again 2-3 times, you’ll still be running your vehicle's tyres with 90% nitrogen and not 100% nitrogen. But even then you’re not guaranteed that your vehicle's tyres will be filled with 100% pure nitrogen. There is no way to measure how much nitrogen is there in your vehicle’s tyre. Nitrogen will cost you, whereas compressed air is free at most petrol pumps or Rs.1-2 at a tyre shop. Nitrogen costs on the other hand vary from place to place and the kind of machine they have. The machines that are at the tyre shops or petrol pumps that offer nitrogen, do not deliver pure 100% nitrogen! Some machines will have a percentage rating of how much nitrogen it provides to the tyre and some have no percentage levels at all. Filling nitrogen in your vehicle's tyres can cost you anywhere from Rs.150 for four tyres to Rs.50 per tyre and can go all the way up to Rs.1,500 for a set of four tyres.

Conclusion

Have you ever noticed that vehicle manufactureres never recommend nitrogen in their manuals or at their service centers. The reason behind this is your vehicle's tyres are manufactured to run on normal compressed air. As long as you maintain the right tyre pressure in your vehicle’s tyre, you’ll be fine.

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The AZuR network has welcomed North Rhine-Westphalia’s first circular economy strategy, viewing the explicit inclusion of used tyres as confirmation of its longstanding engagement. The strategy aims to move the state from linear value chains towards a circular economy and strengthen its position as a leading European location for such practices, with priority areas spanning circular construction, chemicals, technology, circular cities and a high-performing secondary raw materials sector.

Used tyres occupy a dedicated page within the strategy, granting political visibility to a material flow that already requires integrated approaches. These range from extending the service life of suitable tyres through repair and retreading to recovering secondary raw materials via mechanical and chemical recycling alongside complementary processes. The document identifies used tyres as a significant material flow in the state and highlights steel and rubber recovery as well as retreading.

The state government has signalled its intention to expand circular approaches to tyre reuse and recycling, expressly incorporating public procurement and the vehicle fleets of public companies. This reflects a core principle of the tyre circular economy, whereby suitable tyres should remain in use as long as possible, with repair, retreading and regrooving extending service life before mechanical and chemical recycling recover industrially reusable materials.

AZuR is paying particular attention to the political focus on retreading. The strategy notes that retreading is established for commercial vehicle tyres while passenger car retreading has declined, and the state government declares its intention to support retreading projects and further recycling processes. For the network, the inclusion of used tyres creates a starting point for linking the entire tyre circular economy with raw material security, secondary raw material markets, public procurement and industrial competitiveness.

AZuR maintains close contact with the relevant state ministries, contributing the experience and solutions of its network partners across the entire tyre value chain. It will continue this exchange and feed practical experience into implementation of the strategy, with the goal of keeping tyres and their contained raw materials in circulation for as long as economically viable.

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Continental has introduced the ContiMotion EVO, the successor to its well-regarded ContiMotion sport touring tyre. The new model targets motorcyclists seeking a balanced blend of riding enjoyment, safety and longevity. It arrives with multiple product enhancements over the previous generation.

Technical upgrades include new carcass materials that deliver greater stability and consistency, translating into improved handling and more agile dynamics. Updated compounds further boost performance in both wet and dry conditions. The tyre also features Continental's EasyHandling technology for predictable steering, a hybrid silica tread compound for reliable grip, an advanced compound and dedicated pattern for extended mileage and ZeroDegree steel-belt construction with new carcass materials for high-speed stability.

The ContiMotion EVO suits sporty weekend riders and touring enthusiasts alike. It fits motorcycles such as the BMW R12 nineT, Triumph Daytona 660, Ducati Supersport 950, Honda CB 650R, Suzuki GSX-8TT and Yamaha MT-09. It can also be paired with the existing ContiMotion.

Christoph Ettenhuber, Head of Business Field Motorcycle Tires, Continental, said, “With the ContiMotion EVO, we’re offering a versatile sport touring tyre. It combines intuitive handling with reliable grip in both wet and dry conditions – all while delivering impressive mileage for everyday use. The ContiMotion EVO has been upgraded in key areas without losing the fundamental renowned qualities of its predecessor. Riders benefit from a tyre that is noticeably more agile. The ContiMotion EVO is compatible with a wide range of popular naked bikes, roadsters and modern classics.”

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Goodyear takes centre stage at Silverstone this weekend as title sponsor of the Goodyear 4 Hours of Silverstone, the second consecutive year it has headlined the European Le Mans Series event following its return to the calendar last year after a six-year break.

The manufacturer will equip 37 cars across LMGT3, LMP2 and LMP2 Pro/Am with its Racing Eagle tyres. LMGT3 entrants will use the Medium compound, chosen for its adaptability across varying conditions and driving styles, while LMP2 and LMP2 Pro/Am crews run their own Medium specification, a staple of the series since debuting at Le Castellet last season. Wet-weather Racing Eagle tyres remain available should conditions demand.

Silverstone's fast nature is set to shape tactics, with fuel consumption a likely determinant of pit-stop windows. Goodyear anticipates LMGT3 outfits will favour single-stinting to maximise pace on fresh rubber at every stop, whereas LMP2 and LMP2 Pro/Am squads could split between single and double-stinting approaches.

Off-track, Goodyear has arranged several activations. Vector Sport's #10 car ran a special Goodyear Racing livery last weekend at Caffeine & Machine's Warwickshire venue and will race in the same colours. The company also backs Friday's ELMS Charity Run, where Racing Eagle tyre stacks will mark each kilometre and runners finish beneath an inflatable Goodyear arch, with proceeds going to the Luca Guintoli Foundation, supporting families affected by childhood cancer. Goodyear Racing Eagle tyres additionally feature in NASCAR action at World Wide Technology Raceway in Madison, Illinois.

Stephen Bickley, Goodyear Endurance Program Manager, said, “Silverstone should be a fairly straightforward race from a tyre strategy perspective. The high-speed nature of the circuit means fuel consumption will be high, so fuel strategy is likely to be the main factor influencing pit stop timing. The tyre allocations broadly give teams the flexibility to change tyres at every stop, so there is less of a need to stretch a set of tyres purely to save time in a pit stop. We therefore expect teams across both categories to largely focus on single-stinting tyres. The biggest variable at Silverstone is always the weather, which can quickly change stint lengths and pit stop timing.”

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The new AZuR CO₂ savings certificate gives commercial vehicle fleet operators a way to quantify and prove the emissions reductions they achieve through smarter tyre strategies. The tool turns calculated savings into transparent, verifiable documentation, allowing businesses to showcase their resource efficiency efforts. The certification sits within AZuR's wider vision of a closed-loop tyre economy, in which quality tyres are kept in service as long as possible through repair, retreading and regrooving, and materials are recovered through proper recycling channels only once further use is ruled out.

Three distinct levers form the basis of the assessment, and fleets may adopt them separately or together. Reusing sound tyre casings through retreading cuts demand for virgin materials and stretches each tyre's service life. Reprofiling technology from Bear-Machines adds as much as a quarter more mileage to compatible commercial tyres, depending on the tyre and how it is used, while simultaneously trimming fuel burn. Digital tyre management powered by CO2OPT analyses a fleet's tyre usage patterns through artificial intelligence, guiding the selection and deployment of suitable tyres; under the right operating conditions, this can shrink fuel consumption and its associated emissions by as much as 10 percent.

Reliability of the reported figures rests on a defined calculation framework applied to each fleet's own data. The retreading portion draws on life cycle assessment work from Fraunhofer UMSICHT, while the remaining measures follow their own established methodologies and fleet-specific inputs. The result is auditable evidence linking implemented tyre management practices to calculated CO₂ reductions.

Beyond emissions figures, the certificate reveals how deeply a fleet has embraced circular practices by showing its share of retreaded tyres. Three tiers structure this indicator: Category A covers fleets above 50 percent, Category B spans 25 to 50 percent and Category C captures 5 to 20 percent. Documented savings and a practical circularity measure are thus combined in a single certification.

Early adopters already illustrate the concept in action. Over a 12-month window, SIS Internationale Speditions GmbH calculated 31.99 tonnes of CO₂ saved through retreading, CO2OPT software and the fuel savings that followed, with retreaded tyres on more than half its vehicles, earning Category A. The Steinkühler Group, meanwhile, reached 44.72 tonnes of calculated savings in the same period using retreading, reprofiling, CO2OPT and resulting fuel reductions, landing in Category C.

Christina Guth, Network Coordinator, Alliance for the Future of Tires (AZuR), said, “Many companies are already investing in lower-emission vehicles and alternative drive systems. However, it is often overlooked that tyres can also make a quantifiable contribution to reducing greenhouse gas emissions. With the AZuR CO₂ savings certificate, we demonstrate how retreading, reprofiling and intelligent tyre optimisation can be combined in a joint tyre management strategy.”

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