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.

Hankook Tire is set to showcase its advanced commercial tyre portfolio at the inaugural Road Transport Expo (RTX) Ireland, scheduled for 15 and 16 April 2026 at the Eikon Exhibition Centre in Lisburn. Hankook will display the pioneering e-SMART City AU56 EV bus tyre, the new Smart Work AM11+ for regional distribution, the versatile SmartFlex range for long-haul applications and value-focused Laufenn commercial tyres. Organised by the team behind the successful RTX Stoneleigh and RTX Scotland events, RTX Ireland 2026 brings a dedicated truck focus to Northern Ireland. With over 50 exhibitors and an expected attendance of more than 7,000 visitors, the event serves as a crucial hub for the Irish road transport sector to network and discover industry-shaping innovations. Attendees can find Hankook alongside its exclusive distributor, TyreCall and Tractamotors, at Stand C15.

Among the featured innovations is Hankook’s pioneering e-SMART City AU56, the brand’s first electric bus tyre introduced in 2024. Engineered for the unique demands of electric urban transport, this tyre offers low rolling resistance for extended range, reduced noise for enhanced passenger comfort and robust durability to manage the high torque and heavier loads of electric vehicles. Also on show will be the recently launched Smart Work AM11+, a tyre specifically developed for the rigours of regional and local distribution. Its design provides strong resilience against the wear and tear of stop-start operations, making it ideal for demanding sectors like waste management, with reinforced sidewalls for extra protection.

For fleets covering regional and long-haul routes, Hankook will present its SmartFlex range. The SmartFlex AL51 for steer axles and DL51 for drive axles are engineered for consistent performance throughout their lifespan. Reflecting Hankook’s commitment to sustainability and cost-efficiency, these tyres are both regroovable and retreadable. Complementing the Hankook portfolio, visitors can also explore the Laufenn brand, including the Laufenn365 initiative. The Laufenn commercial range, featuring the LF95+ trailer tyre, LF22 all-position tyre and LZ22 drive tyre, leverages Hankook’s advanced technology to deliver strong value, full retreadability and a reduced environmental footprint, catering to budget-conscious operators. This participation underscores Hankook’s growing leadership in the UK truck tyre replacement market, driven by continuous innovation and tailored solutions for an evolving industry.

Jon Cottrell, Truck and Bus Sales Manager, Hankook Tyre UK, said, “We are looking forward to the first Road Transport Expo in Northern Ireland – it’s a fantastic opportunity to build meaningful connections and stay informed on the latest developments shaping the industry. 2026 marks the inaugural RTX Ireland and our first time exhibiting in Northern Ireland, which makes it particularly exciting. We’re proud to be attending alongside our exclusive distributors, TyreCall and sister company, Tractamotors, who we have had a strong partnership with for the last 40 years. We look forward to welcoming both existing and prospective customers to our stand while gaining valuable insight into the Irish truck tyre market.”

The Tire Industry Project (TIP) has released the updated Product Category Rules (PCR) for tyres in collaboration with UL Environment. This revision establishes a more robust framework for measuring environmental performance and promotes consistent transparency throughout the tyre sector.

A Product Category Rule serves as a standardised guide for manufacturers to conduct lifecycle assessments and create Environmental Product Declarations that enable meaningful comparisons between similar products. Valid for the next five years, the revised PCR integrates current scientific findings, including enhanced methods for tracking greenhouse gas emissions. It reflects modern production realities such as the adoption of renewable energy in manufacturing plants and incorporates evolving vehicle technologies like improved fuel economy and alternative fuel sources. The update also mandates uniform reporting when new materials are introduced, simplifying the monitoring of sustainability advancements.

Independently adopted by the 10 member companies of the Tire Industry Project, which collectively account for 60 percent of global tyre production capacity, this fourth edition encourages wider voluntary implementation across the industry. Developed through collaboration among major manufacturers, the PCR standardises how environmental footprints are calculated from raw material extraction through disposal, ensuring comparability of Environmental Product Declarations. This comparability supports environmentally conscious purchasing decisions and fosters ongoing improvements in sustainability across the value chain.

Key enhancements include refined carbon footprint calculations addressing biogenic carbon, expanded applicability to all tyre categories including off-road and specialty tyres and greater regional accuracy by incorporating localised data on end-of-life tyre management, vehicle efficiency, energy mixes and payload considerations. The methodology now provides a clear hierarchy for assessing impacts in multi-product manufacturing environments, aligns impact indicators with the European Commission’s Environmental Footprint 3.1 framework and updates raw material datasets and emission factors for improved data quality.

UL Solutions, an independent safety science organization, collaborated closely on developing and publishing this updated PCR.

Dr Larisa Kryachkova, Executive Director, TIP, said, “The updated PCR reflects years of collaboration and investment to advance sustainability across the tyre value chain. Our goal is to strengthen environmental reporting. With a common methodology, we support better industry-wide decision-making, turning ambition into positive environmental action.”

Ranee Valles, Director and General Manager – Product Sustainability, UL Solutions, said, “Transparent, standardised reporting enables manufacturers, regulators, fleet operators and consumers to make informed choices about the products they use or supply. Our collaboration with TIP reflects a shared commitment to credible, science-driven solutions, and we’re grateful for TIP’s leadership in advancing scientific rigour and industry alignment on environmental reporting.”

Sun Auto Tire & Service, one of the largest independent tyre and automotive service providers in US, has expanded into Colorado by acquiring 23 locations from DAS Drive Automotive Services, marking its entry into the state. This move establishes a notable presence for the company in the greater Denver area while simultaneously enhancing its existing footprint in Arizona. As a result, the Sun Auto Network broadens its service coverage throughout the Southwest region.

With the integration of these locations into the network, customers will now benefit from an expanded suite of offerings. These include access to well-known national tyre brands, the implementation of digital vehicle inspections and an extended range of service capabilities. Furthermore, a nationwide warranty, supported by over 575 locations across the country, provides added assurance. The acquired shops will also tap into shared operational resources, benefit from advanced training initiatives and utilise integrated technology systems, all designed to ensure a uniform and high-quality experience for customers and support for technicians.

This strategic growth is in line with Sun Auto's overarching goal of sustainable expansion. The company prioritises partnerships with established operators who demonstrate a strong dedication to service excellence, the professional development of their teams, and deep-rooted community ties. Through this latest acquisition, the Sun Auto Network continues to extend access to dependable automotive care while reinforcing the communities and personnel fundamental to its ongoing success.

Chris Ripani, Chief Operations Officer, said, "We're excited to welcome these respected brands and their teams to the Sun Auto Network. Each of these businesses has built strong relationships in their communities by delivering dependable service and taking care of customers the right way. That commitment aligns perfectly with the values we look for in every partnership."

TyreSafe, UK’s charity dedicated to raising tyre safety awareness, has welcomed Essex Police as its newest road safety partner, furthering a joint effort to address the dangers posed by defective and unlawful tyres across one of UK’s most expansive and varied policing regions. As the largest non-metropolitan force in the country, Essex Police serves over 1.86 million residents, covering a diverse landscape that includes dense urban areas, vast agricultural regions, 400 miles (approximately 643.74 km) of coastline and key national assets such as Stansted Airport and the Port of Tilbury.

This partnership adds Essex Police to a nationwide network of more than 250 TyreSafe affiliates, all working collaboratively to reduce collisions stemming from tyre-related offences and neglected vehicle upkeep. The force’s Head of Roads Policing, Adam Pipe, characterised 2025 as exceptionally tragic due to a spike in road deaths. In response, enforcement was intensified, revealing a persistent pattern of tyre violations during checks.

Officers noted that tyre defects frequently appear on vehicles driven by individuals under the influence of alcohol or drugs. This combination of risky behaviour and poor vehicle care significantly endangers others. During the winter anti-drink and drug driving initiative, Operation Limit, numerous tyre issues came to light. These included a vehicle stopped with four completely bald tyres, two of which showed exposed cords, leading to an immediate driving ban. A single day of action in Maldon uncovered eight construction and use offences, ranging from shallow tread to sidewall damage. At least one driver was reported for visible tyre cords, an offence that typically attracts fines and licence points. The Commercial Vehicle Unit also utilised thermal cameras and tread gauges during HGV inspections, finding that a considerable number of commercial vehicles required warnings or prohibitions for tyres nearing the legal limit.

These incidents highlight the widespread nature of the problem and the substantial threat it poses to everyone using Essex’s roads. Defective tyres are a major but avoidable hazard, contributing to diminished control, longer stopping distances and heightened danger in wet conditions. UK regulations mandate a minimum tread depth of 1.6 mm for cars and vans and 1 mm for large goods vehicles and larger motorcycles. Tyres must also be free of significant damage and correctly rated for their vehicle. Offenders risk fines reaching GBP 2,500 and three penalty points for each illegal tyre.

Inspector Steve Rooney, Roads Policing, Essex Police, said, “We are seeing first-hand just how many vehicles on our roads are being driven with tyres that are worn, defective or in an outright dangerous condition. The risk to the public is enormous, yet the fear of detection among offenders remains low. By partnering with TyreSafe, we aim to raise awareness, improve compliance and ultimately reduce avoidable harm on our roads.”

Stuart Lovatt, Chair of TyreSafe, said, “We are delighted to welcome Essex Police as a TyreSafe road safety partner. The scale and diversity of Essex’s road network – from urban centres to major freight routes – means the force plays a vital role in protecting millions of road users every day. Enforcement highlights the issue, but education and awareness are equally important. By working together, we can ensure more road users understand their legal responsibilities and the simple checks they can carry out to keep their tyres safe and roadworthy. Preventing tyre-related incidents is entirely achievable, and partnerships like this are key to reducing avoidable harm on our roads.”