Since the 1970’s the Anti-Lock Braking system, now almost ubiquitous, has been helping drivers retain control during heavy braking on wet or slippery roads. The wheel rotation sensors, at the heart of ABS, have been co-opted into traction and stability control systems. Drivers do not consciously rely on these systems to save them from a mistake but seasoned drivers (code of older people) will have noticed that they appear to be much better drivers now than when they were in their 20’s. Which is surprising as reaction times increase with age.

What has been happening over the last thirty years is that vehicle safety systems have become more intelligent and tyres have more grip resulting in minor driver errors being recoverable by a combination of driver input, ABS, ESC and ATC. This list of potentially lifesaving innovations will soon include ‘look-ahead systems’ preventing us from tailgating the car in front or straying out of our motorway lane. None of these worthwhile advances has relied upon sensors embedded in the tyre because such sensors were not needed. Will embedded tyre sensors be capable of delivering worthwhile improvements to safety and/or vehicle dynamics without causing service and support problems for vehicle owners.

Quiet tyres

To develop tyres that run more quietly, with better grip and with lower rolling resistance knowledge of what is happening to the tyre as inputs change is vitally important. There will always be a need for tyre sensors that can provide real operating data that supports the predictions made by the analytic tyre models that are increasingly at the centre of our tyre development. Bay Systems responded to this need in 2006 by developing the Tyre Cavity Microphone (TCM) and other measurement modules that are used to study the behaviour of tyres in the laboratory and more importantly on the road, the environment where they are used. When comparing laboratory and road measurement it was clear that road data contains random variations not seen in the laboratory, see figures 1a & b.

The sound pressure level (SPL) inside a tyre is usually dominated by cavity resonance modes, the primary mode being strongest. The rms level of the noise inside the tyre’s cavity, at any given speed, responds to the texture of the road surface, the coarser the texture the higher the rms level. With a little signal processing the signal from the TCM’s microphone can be processed to give an indication of the road surface condition as can the signal from the TCA’s accelerometer mounted or embedded in the tyre liner, see figures 2 a & b.

The microphone positioned on the rim and integrated into the TPMS housing is potentially in a much safer location than a sensor buried in the tyre’s structure. Tyre fitters are used to remove and install TPMS modules making maintenance easier and more affordable than repairing sensors buried in a tyre’s structure. Inevitably sensors and systems will fail and any sensor mounted in the tyre is destined to have a stressful life. Tyre liner temperatures can exceed 120 degrees C depending on; speed, ambient temperatures and tyre type. Elevated temperatures (>50 degrees C) degrade batteries and semi-conductors. Most semi-conductors fail or suffer dramatically shorter service lives if their ambient temperature regularly reaches 80-100-degree C.

For many drivers the prospect of warning lights burning on their dashboards due to tyre mounted transducers failing will be very unwelcome, particularly if the recommended cure is to buy a new tyre. If the only way to pass the annual vehicle inspection, common in many countries, is for the tyre safety system to be working or not fitted then the not fitted option will be preferred by most buyers of used vehicles. If SMART wheel sensors can be shown to deliver genuine benefits then integrating them into a rim mounted package might be the lowest risk approach, at least from the customer’s perception.

Universal TMS

A Universal Tyre Monitoring System (UTMS) package would therefore appear to be the most attractive option in terms of convenience and minimising the costs associated with maintenance and repair. Essentially the Bay Systems’ TCM system is a UTMS system, albeit for R&D use only. The key question is therefore; ‘Can the data from UTMS be usefully employed to enhance vehicle utility, handling and safety?’ This is a difficult question to answer, for handling and safety, as for these applications the chassis management system (CMS) computer must receive and process signals in real time for the information to be usefully employed. Being informed that road surface icing has occurred some 30 metres after the vehicle has transitioned onto ice is liable to be too late. The signal from a tread liner accelerometer, see figures 3a. shows the transition from wet to flooded road, N.B. the vehicle was not aquaplaning but a slight increase in speed might well have invoked it. This raw time history would need to be processed before it could be used to trigger an intervention, in figure 3b a wavelet transform is used to highlight the differences between wet and flooded road surfaces. Real time responses imply high data rates from sensors, which in turn result in higher power consumption. Getting power to and signals back from the two front wheel sensors, rear wheel road surface information is typically front wheel data delayed by 3 metres, or from all wheels will be a challenge. Vehicles may be parked for days and even weeks, UTMS must shut down completely to conserve battery life. This may be achieved using a motion switch, these are readily available but as always adding complexity increases the risk of failures. The bigger problem is how to maintain and recharge the battery during normal usage. Any form of physical coupling through a connector will certainly be damaged or fail through water ingress making some type of induction coupled charging a more attractive option.

Low power radio transmission has worked well for TCM. However, such a system across the entire vehicle fleet may present problems on densely trafficked roads. On a busy motorway a vehicle might pass within 2 metres of another vehicle at a rate of 10 per second. Should all of these vehicles be using the UTMS radio spectrum then there will be up to 40 channel contentions per second to resolve. It is unlikely that radio spectrum will be made available that allows space for more than 100 channels. Each vehicle’s UTMS radio system must be primed to channel hop to avoid contentions from up to 10 interfering vehicles per second while sustaining a minimum data rate of 100kbytes per second.

Such a work load imposed be an ever-changing mix of vehicles will be difficult to manage without gaps in the data. A possible solution exists if the transmitted power from UTMS is very low, to the point that signals are only detectable inside the transmitting vehicle’s own wheel arch. Very low power radio transmission also brings low power drain at the transmitter making power supply easier. However, it also implies that a high receiver sensitivity might be needed. The extremely weak signals from nearby vehicles may therefore become detectable which returns us to the problem of radio channel contentions. Setting a low transmission power limit is therefore likely to be an area of diminishing returns and the channel contention issue is likely to always exist for high data rates.

To calculate the instantaneous rolling resistance of each wheel the CMS will require only two measurements; the temperature of the tyre and its pressure. A once per second reading rate for these two parameters would be enough, due to the tyre’s relatively high thermal inertia and

the normally slow rate of change of inflation pressure. The liner temperature measurement might be over a single area or across a section of the tyre. In the case of our TCT system (aimed at tyre R&D) the measurement is over 64 pixels and can stretch from bead to bead or be focused on an area if interest e.g. the tyre’s shoulder with an accuracy of 0.1 degrees C and resolution of 0.01 degrees C. A measurement cycle, even at high resolution would require a data packet of less than 200 bytes which with overhead might be 1kbytes. This rate would fit into the radio channels even on a busy motorway making dynamic estimation of rolling resistance possible while real time road surface measurement would be problematic.

Rolling resistance can account for up to 30% of battery energy in an EV making the choice of tire and the way the vehicle is driven very important; potentially being the difference between driving and walking the last few miles home on a cold wet night! There will be, for any journey, an optimum vehicle speed and route where energy consumption will be minimized. The probability of reaching the destination will be increased if this route is followed but it is more important to alert the driver if there is a significant probability of not reaching the destination on the remaining battery charge.

EVs with batteries that are over three years old may have battery capacities of 80% or less of the new capacity. This makes a planned journey of just 100miles (160km) problematic, particularly when air conditioning, heater and windscreen wipers are all operating. This range deficit may increase with traffic conditions such as road works, detours, accidents etc. To increase driver confidence a fully integrated vehicle management and GPS route planning system would need to use environmental data such as ambient temperature, wind speed and direction together with vehicle data such as load and UTMS derived tyre liner temperature and pressure to calculate the projected energy consumption for any proposed route. For this total tyre energy budget to be calculated for the journey the full tyre specification will be needed for each tyre i.e. the rolling efficiency for all temperatures, inflation pressures, loads and temperatures. The GPS navigation system, using these parameters and taking into account traffic updates would then evaluate the probability of reaching the destination without a battery recharge. If the journey was beyond the battery range an alternative route would be suggested that would pass a recharging station.

Data accuracy

The key to all this working reliably will be the accuracy of the tyre specification data entered into the CMS. What will be needed will be the full energy dissipation profile for all conditions, not just the laboratory performance rating, though this would be better than nothing. Tyres are currently rated for energy dissipation (rolling resistance) when operating in a laboratory at 25 +/- 4 degrees C while running on a smooth steel road wheel. The tyre is run for 30 minutes at 80kph before the test, is correctly inflated and is carrying 80% of its maximum load. Our measurements have revealed that the liner temperature across similar tyres from different manufacturers can vary from 50 to 90 degrees C for this test.

Energy dissipation drives the liner temperature higher until thermal equilibrium is reached. On the road, in the real world, the maximum temperature measured on the liner of a Mazda BT50 pickup truck tyre was 45 degrees C when pulling a trailer at a steady 100kph for 6 hours with an air ambient temperature of 22 degrees C. i.e. much lower than would have been expected. Energy efficiency improves with increasing temperature at the rate of 0.6% per degree C, over the temperature range 15-50 degrees C. It is highly likely that most tyres operating in temperate regions are not delivering their labeled energy efficiencies because they are running cool. This applies even in the summer when ambient temperatures are near those specified for the laboratory. In the winter the Mazda truck tyre did not reach 30 degrees C. i.e. half of the lab test result and probably 2 full tyre grades worse performance than the label states, possibly resulting in a 5+ mile shortfall in vehicle range.

While the case for in tyre sensors and even rim-based sensor fitment to vehicles is open to debate the case for their use in R&D is now well proven and accepted. Tyre internal noise and tyre cavity resonance is easily and reliably measured with good accuracy, both on a laboratory road wheel and on the highway. The differences between tyres from different manufacturers can be quickly evaluated, see figures 4 a & 4b, allowing car makers to choose a tyre best suited to their vehicle and the road surfaces it is most likely to be driven over. For the tyre companies their new product development can be steered towards lower levels of noise and cavity resonant modes.

The primary cavity resonance mode if heard in the vehicle cabin is annoying and is often interpreted by the owner as a defect. For auto makers noise complaints are a concern as investigation in the field is costly and if unresolved becomes a barrier to a repeat sale. Tyre companies are encouraged by auto makers to reduce cavity resonant mode levels and reduce road noise. The loss of vehicle control is a much more serious matter and has always been at the top of the priority list for tyre and auto companies. The measurement of tyre liner acceleration provides a great deal of information including early warning that the threshold for aquaplaning is imminent, see figure 3a.

Reductions in pre and post contact patch waves, see them clearly in figure 5, that propagate around the tyre will lead to reductions in radiated noise and lower pass-by noise levels. No improvement in a tyre’s characteristic comes free of charge and this cost is often a trade off with other equally desirable characteristics. Typically, less grip and faster wear rates are what result when a tyre’s energy dissipation is improved. Wet grip performance is featured on the tyre label and who would deliberately choose a tyre with lower wet grip. Leaving the most likely trade off candidate as wear and of course faster wear means more particulates shed into the environment which is undesirable. It seems likely that wear rate will soon appear on the tyre label. There seem to be no unalloyed successes, only the least worst choices to be made!

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Pirelli has entered into a strategic agreement with Swedish technology firm Univrses to integrate artificial intelligence-based computer vision systems into its Cyber Tyre platform. As part of the deal, Pirelli has acquired a 30 percent stake in Univrses, with an option to increase that share to a majority holding. The collaboration will embed Univrses’ 3DAI technologies into Pirelli’s existing Cyber Tyre solutions, creating a unified system aimed at producing safer and higher performing vehicles.

The combined technology has potential applications in advanced driver-assistance systems and autonomous driving. It also generates timely, actionable data for road management, helping authorities make better decisions and deploy resources more efficiently. This could lead to fewer road accidents and saved lives. The system uses onboard cameras and tyres to collect feedback on road conditions. Pirelli’s Cyber Tyre, the first integrated hardware and software system of its kind, gathers data from tyre sensors, processes it with proprietary algorithms and communicates in real time with vehicle electronics and the cloud.

Univrses originally developed its technology to help cars understand their surroundings, but it has since been adapted to turn vehicles into AI-powered road monitoring agents. The Swedish company’s 3DAI Engine provides autonomous vehicles with perception capabilities including 3D positioning, mapping and spatial deep learning. Its 3DAI system digitises roadside infrastructure using data from vehicle-mounted sensors like cameras.

A pilot project is already active in Italy. In 2025, Pirelli and the Puglia Region launched a road network monitoring system to create an updated map of infrastructure conditions. The system analyses data from tyres via the Cyber Tyre platform alongside visual data from cameras interpreted by Univrses’ technology.

Andrea Casaluci, CEO, Pirelli, said, “The agreement with Univrses further enhances our Cyber Tyre™ platform, thanks to advanced AI‑based artificial vision technologies. The collaboration between Pirelli and Univrses will make a significant contribution to the ongoing transformation of cars into true software‑defined vehicles.”

Jonathan Selbie, CEO, Univrses, said, “Continuous monitoring and data are becoming the new foundation for infrastructure asset management, and Univrses technology is able to provide powerful analytical capabilities based on reliable and frequently updated data. In this context, we are pleased to welcome Pirelli as an investor and to take our partnership to the next level: we will join forces to deliver increasingly advanced services and products.”

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ZC Rubber is preparing a major European-focused showcase at THE TIRE COLOGNE, scheduled to run from 9 to 11 June 2026. The tyre manufacturer will occupy Booth C050g in Hall 8.1, highlighting its WESTLAKE and GOODRIDE brands with a clear emphasis on products tailored specifically for regional market demands.

The display will blend imminent and future innovations. Products destined for a European launch in the latter half of 2026 will appear alongside the company’s current truck and bus radial lineup. Selected previews of developments planned for 2027 will also be on view. A featured attraction is the Westlake Sport RS2, a drift-proven ultra-high-performance tyre praised for its grip, precision and 180 treadwear rating. A renewed rubber compound, developed through work with the Red Bull Driftbrothers, now delivers steadier traction under severe driving conditions. Appearing at the stand, Red Bull Driftbrothers driver and engineer Elias Hountondji will illustrate how motorsport data directly refines ZC Rubber’s product engineering.

Additional new passenger car radial models for Europe in the second half of 2026 include the Westlake ZuperFlex Z-137, Goodride RideMax G-147, the all-season Westlake Zuper4S Z-411 and the off-road focused Westlake Terra Legend SL399 and Goodride Mud Legend SL388. On the truck and bus side, already available tyres such as the Westlake WSL2, Westlake WDL2+ and Goodride S2, D3 and D4 will be exhibited, covering steer and drive axle needs for long-haul and heavy-duty transport.

A sneak peek at 2027 offerings will feature the Westlake Z-301 commercial van tyre, Goodride All Season G-721, Goodride SnowComfort G-518 and new TBR models including the Westlake WTL2, Westlake WTR OEM and Goodride M2. ZC Rubber’s team will remain on-site throughout the event, welcoming visitors and partners to the booth for meetings and professional discussions.

Leo Liao, General Manager, ZC Rubber Europe, said, “This year’s showcase reflects a much broader and more complete portfolio for Europe. From UHP and all-season tyres to all-terrain, mud-terrain and TBR solutions, we are bringing new developments across almost every major segment. This reflects how seriously we take the European market: we are listening to local needs, investing in the right products and building a portfolio that better matches the needs of our European partners.”

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Magna Tyres has launched the MA801 TR, a new solid tyre engineered for extreme operating conditions in recycling facilities and heavy industrial settings. Designed to maximise equipment uptime while supporting high load capacities, the tyre is built to deliver dependable performance in harsh environments. The official debut of the MA801 TR will take place at IFAT 2026 in Munich, scheduled from 4 to 7 May 2026.

The new model is intended for compact wheel loaders and telescopic handlers, featuring a flat-free solid construction. Its extra-deep non‑directional tread is reinforced by a triangular structural design, which enhances traction and stability on surfaces littered with sharp debris. Available in sizes 13.00‑24 and 14.00‑24, the tyre prioritises puncture resistance and reduced maintenance needs.

Thanks to its robust architecture and deep tread profile, the MA801 TR offers an extended service life and consistent performance across demanding work cycles. By eliminating the risk of flats, Magna Tyres positions the tyre as a reliable solution for recycling and industrial operations where continuous heavy loads are standard.

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The Yokohama Rubber Co., Ltd. has secured validation from the Science Based Targets initiative (SBTi), a prominent corporate climate-action organisation, for its greenhouse gas (GHG) emission reduction targets set for 2035. This endorsement confirms that the company’s goals are scientifically aligned with the standards established under the Paris Agreement. The validated targets are measured relative to the company’s 2024 emission levels.

Under the approved framework, Yokohama Rubber aims for a 63.0 percent reduction in combined Scope 1 and Scope 2 emissions, which cover direct emissions from its business activities as well as indirect emissions from purchased energy. Additionally, the company commits to a 37.5 percent cut in Scope 3 emissions, specifically targeting indirect supply chain emissions from purchased products and services, along with fuel and energy-related activities not included in Scope 1 or Scope 2. To achieve these reductions, Yokohama Rubber has been expanding solar power generation and renewable energy electricity at its global plants, while also disclosing indirect emissions from product distribution, use and disposal since 2013.

The company obtained SBTi validation to accelerate supply-chain-wide emission cuts in response to intensifying climate challenges. Operating under its sustainability management slogan, ‘Caring for the Future’, Yokohama Rubber continues to create shared value by tackling social issues directly through its business operations.

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