Unlocking Tyre Testing
- By Adam Gosling
- December 24, 2024

Please forgive my indulgence on the topic of tyre testing, but the end result of a safe tyre is, the tyre is only safe IF the appropriate inflation pressure is used!
The physical road testing of a pneumatic tyre is the last part in a very long line of testing procedures used to manufacture the tyre. The actual manufacturing is not the end of the line as the tyre has to be competently mounted to a wheel and then appropriately inflated prior and during use.
If the tyre/wheel assembly is not balanced in mass and dimension, then the tyre is not going to perform as expected, nor will the tyre perform as expected if the inflation pressure is not appropriate to the load and speed the vehicle is going to be utilised at.
The humble pneumatic tyre is a composite assembly of many different materials, each having to work in harmony and unison with each other.
The different materials used to manufacture the tyre have already undergone substantial testing as individual products to assure the sought-after properties and qualities are exactly what is required to produce a tyre that is not only safe but performs as expected.
Many years ago, on a major construction project in Asia with one of my clients, the tyre company I was an engineer with suffered many catastrophic tread separation failures. This was a time critical project so having haul trucks out of service was a serious impediment to achieving the extensive earthworks required. A long story short, I was given to understand that there was a change in the supplier of the carbon black used in this particular tyre tread specification. The fresh manufacturer’s product checked all of the (then) testing parameters, but when it came to actual live service, there was a deficiency somewhere. I was never privy to the actual product details, just the end result of seeing haul trucks with fuel and hydraulic tanks on the ground having been slapped off by tread packages parting from the tyre casing. Having up to 1,000 kg of tread rubber flapping out of control is not conducive to a safe operation.
The testing regime for the product used was seemingly insufficient to identify this issue pre-production, ending up with very costly results.
One can read in various publications of tyre testing where a group of journalists and motoring writers take vehicles fitted with various tyre producers’ products around a circuit in an attempt to quantify the performance, in lap times, but more importantly, in feel. ‘Through the seat of your pants’ is a commonly used phrase. As a young two-wheel motorcycle racer, I progressed from using treaded road tyres to a full racing slick. The feeling was totally different and, to be honest, I didn’t ever get the slick tread tyres to operate as they were designed. After progressing to three-wheel bikes (sidecars), slicks became the ideal product.
In todays’ tyre production world, I suggest that the development on MotoGP motorcycles leads the way. Think of a MotoGP bike where cornering lean angles of up to 65 degrees, yes 65 degrees, are common place, all the time transmitting a power to weight ratio of more than 1:1, which is more than one horsepower per kilogramme of weight (including the rider!). When combined with the technology developed in the giant OTR tyres used in mining, the development of tyre performance is progressing rapidly. The ability of a giant mining tyre to support a load in excess of 100 tonnes per tyre (think 50 average passenger cars, yes that’s per tyre) whilst travelling at 60 km/hr is an everyday event for a mining operation. These tyres on a drive position transmit thousands of horsepower to motivate the truck. These numbers are far in excess compared to your daily drive!
A passenger car tyre benefits greatly from all of this research and development leading to the actual physical testing of the tyre in the hands of the journalists pushing a car around a circuit.
Yet, all this testing can be undone by the end user’s reluctance to verify that the tyre’s operating pressure is appropriate for the duty cycle being undertaken. The adoption of real time tyre pressure monitoring (TPMS) has generated an increase in safety IF the driver actually uses the data.
Race pilots (drivers and riders) carefully study the operating tyre pressure detail as they well understand that just ½ a psi may make the difference between winning or finishing off the podium.
Alas, our industry has not really educated the daily driver to the critical importance of ensuring their tyres have the appropriate inflation pressures installed. Inflation, it seems, is only important to economists and price rises.
All the material testing, quality control in production and physical mounting of the tyre can be undone by the ignorance of the end user in not attending to the inflation pressures adequately. No matter how deep the science used, the quality control measures employed within production our product’s success remains at the whim of the end user as to whether they can be bothered to ensure the very item that provides their safe passage is indeed fit for purpose.
Regardless of the impressive advances in testing technology, the serious quantitative leaps in the use of computer aided design and manufacture, the improvements in material science yielding growth in all the useful features for a tyre combined in production benefitting the end result can be undone by end user apathy. As an industry, we have a programme of continuous improvement, but does the end user have the same? Do they care?
For all the testing programmes we, as an industry, have in place, the one lacking I feel is the understanding of the level of knowledge from the perspective of the driver. Do they understand the information that the physical tyre testing provides? In the case of a motoring enthusiast, very much yes, but they make up a small percentage of the population.
The advent of the Euro 7 standards will draw the performance of tyres into the everyday realm for the legislators and regulators. Again, how the daily drivers that use their vehicles for commuting actually care is an unknown, and I feel that the care factor is probably less than zero.
In speaking with learner drivers, I ask whether the driving instructors had mentioned tyres at all and was totally unsurprised when the answer came back as a no. I know I have said before that unless we can engage drivers into understanding and appreciating their tyres’ contribution to their personal safety whilst driving, then our industries progress will be stymied.
All the progress in material science, advanced vehicle standards, wonderful testing regimes can all be negated when the vehicle driver ignores the very basic of the tyres operating requirement – the appropriate operating inflation pressure.
How we change the mindset of the end user is still testing my knowledge and patience; it is more than tiring to keep on hearing that people don’t even acknowledge the benefits they enjoy from the use of the product our industry produces.
Please educate the end user on the critical importance their tyres have in overall on-road safety. Look after your tyres, so when you call upon them to look after you, they will be appropriately equipped to do so.
Stay TyreSafe
JK Tyre Targets Double-Digit Growth in FY2026, Targets INR 10 Billion CAPEX
- By Nilesh Wadhwa
- August 08, 2025

JK Tyre & Industries is aiming for double-digit revenue growth in FY2026, outpacing its forecast for single-digit expansion across the broader tyre industry. Managing Director Anshuman Singhania outlined the company’s ambitions during a post-earnings media call, underscoring confidence in demand recovery and strategic market positioning.
Q1 Performance Overview
For the first quarter of FY2026, JK Tyre reported revenue of INR 38.91 billion, with EBITDA at INR 4.24 billion, translating to a margin of 10 percent. Net profit stood at ₹1.55 billion — up 51 percent compared with the previous quarter, but down 21 percent YoY.
Singhania attributed the annual decline to muted original equipment (OE) demand, particularly in truck and bus radial (TBR) volumes, alongside higher raw material costs compared to the same period last year. He also highlighted an adverse impact from the company’s Tornel business in Mexico, which faced uncertainty due to tariffs on exports from Mexico to the United States, dampening volumes.
Resilience in Domestic and Export Markets
Dr Raghupati Singhania, Chairman and Managing Director, JK Tyre & Industries, said, “The growth momentum in domestic markets remained robust in Q1, with JK Tyre clocking a sales growth of 11 percent YoY, as contributed by a steady demand for our products in both replacement as well as OE segments, underscoring JK Tyre’s continued focus on core growth drivers and strengthening market presence.”
“Despite a challenging and uncertain macro-economic environment, exports of passenger car tyres witnessed a strong traction both on QoQ and YoY basis, signifying pull for our products and enhanced brand perception in the global markets,” said Dr Singhania.
Operational efficiencies and strategic pricing supported performance, even as natural rubber prices remained elevated. Subsidiaries Cavendish (India) and Tornel (Mexico) continued to contribute significantly to the group’s consolidated financials.
Operational efficiencies and strategic pricing supported performance, even as natural rubber prices remained elevated. Subsidiaries Cavendish (India) and Tornel (Mexico) continued to contribute significantly to the group’s consolidated financials.
Regarding trade tensions between India and the US, Anshuman Singhania noted that exports from India to the US account for only around 3 percent of JK Tyre’s revenue and could be redirected to markets such as Mexico, Latin America, Brazil and the UAE if required. With zero tariffs in Mexico, JK Tyre can utilise its production base there to meet demand for both passenger and truck radials. The EU and UK, where JK Tyre holds a strong position in the TBR segment, also remain tariff-free.
Capacity expansion
The company’s INR 14 billion capital expenditure plan is progressing on schedule, covering passenger car radial (PCR), TBR and all-steel truck radial projects. For the year, investment is expected to total INR 9-10 billion, aimed at boosting production capacity by 30-40 percent.
A key driver for future profitability is the shift towards premium products. The share of 16-inch and above passenger car tyres in JK Tyre’s portfolio has grown from 18 percent in FY2020 to 25 percent in FY2025, with a target of 40-45 percent over the next two to three years. This change is being fuelled by rising SUV sales, larger rim sizes in entry-level cars and strong export demand.
The company has also developed a complete range of tyres for electric vehicles, spanning commercial truck radials, bus tyres, passenger radials and two/three-wheeler tyres Major OEMs such as Ashok Leyland’s Switch Mobility and Tata Motors are sourcing these products, including for last-mile connectivity vehicles and newly launched EV buses.
Market Outlook
The replacement market has been a bright spot, with passenger radial volumes up 32 percent year-on-year and truck radial volumes growing in the high single digits. JK Tyre expects demand to strengthen in the second half of FY2026, supported by infrastructure development, a favourable monsoon, potential interest rate cuts, and improved consumer liquidity.
Anshuman Singhania stressed that the worst of raw material price pressures appear to be over, paving the way for margin improvement as the product mix shifts and capacity utilisation rises. With the small car segment’s gradual decline offset by growth in premium categories, JK Tyre remains confident in sustaining momentum.
“Overall, India is poised for growth,” Singhania concluded. “We see positives across the board — from infrastructure push to evolving consumer preferences — and we are well-positioned to capitalise on these trends.”
Yokohama Rubber begins OE tyre supply for BYD’s SEALION 6 DM-i SUV in China
- By TT News
- August 07, 2025

Yokohama Rubber has begun supplying its ADVAN V61 tyres as original equipment for BYD’s new SEALION 6 DM-i SUV, marking the Japanese manufacturer’s first OE partnership with the Chinese carmaker.
The SEALION 6 DM-i, a plug-in hybrid SUV launched by BYD Company Ltd. this July, is being factory-fitted with 235/50R19 103V size ADVAN V61 tyres. The announcement comes as Yokohama seeks to grow its footprint in China’s fast-evolving electric and hybrid vehicle market.
The ADVAN V61 is part of Yokohama’s global flagship ADVAN range and is positioned as a premium SUV tyre. The company said the tyre “offers ADVAN’s hallmark premium-grade driving performance, along with a high-level balance of fuel and energy efficiency, handling stability, and quietness, achieving both comfortable city driving and long-distance touring for heavyweight SUVs.”
The SEALION 6 DM-i combines a 1.5-litre naturally aspirated petrol engine producing up to 74kW with an electric motor generating 160kW. Buyers can choose between 18.3 kWh and 26.6 kWh blade battery options, offering electric driving ranges of 93km and 130km, respectively. All models come equipped with advanced driver assistance systems as standard, and the exterior design draws inspiration from the concept of “ocean aesthetics.”
Sumitomo Rubber’s Tyre Unit Clears Japan Antitrust Probe With Commitment Plan
- By TT News
- August 07, 2025

Sumitomo Rubber Industries Ltd said its subsidiary Dunlop Tyre Japan Ltd has completed a Japan Fair Trade Commission investigation into automotive all-season tyre sales after the regulator approved a commitment plan submitted by the unit.
The probe, which examined the subsidiary’s sales practices, concluded without the commission identifying any violation of Japan’s Antimonopoly Act, Sumitomo Rubber said in a statement.
Under Japan’s commitment procedures, companies can submit plans to address potential competition concerns without admitting wrongdoing, allowing them to resolve investigations while avoiding formal sanctions.
"We deeply apologise for the great trouble and anxiety that we have caused to all concerned, including our clients and business partners,” the tyre maker said.
Bekaert Warns Of Weakening Demand As Tariffs And FX Weigh On Outlook
- By TT News
- August 04, 2025

Belgian steel wire maker Bekaert reported resilient first-half 2025 earnings as strong cash generation and cost control offset softer sales, but warned that tariffs and currency pressures are weighing on demand.
The company posted consolidated sales of €1.9 billion, down 5.2 percent year-on-year, with volumes declining 2.6 percent and price/mix effects stripping out a further 2.2 percent. Underlying EBIT slipped 16.2 percent to €171 million, delivering a margin of 8.8 percent compared with 9.9 percent a year earlier.
Free cash flow surged to €123 million from €43 million in the prior-year period, driven by a €135 million reduction in working capital and €21 million in cost savings as the company continued to streamline operations and rein in capex. Net debt fell to €327 million from €399 million despite a continuing €200 million share buyback programme, €74 million of which has been completed.
“We have continued to focus on what we can control best – cash flow and costs - and have significantly reduced overheads and working capital in H1 2025,” chief executive Yves Kerstens said. “Equally, I am very pleased with the hard work of our teams fighting for volumes in the current challenging markets.”
He added: “We are also taking further steps to make our business units more autonomous and agile. Therefore, I am very confident that we will come out of the current business environment stronger and more cost competitive than ever before.”
Bekaert said volumes were particularly strong in its Steel Wire Solutions and Rubber Reinforcement divisions in the United States and China, while European and Latin American demand lagged. Its Brazilian joint ventures delivered €24 million in net profit share, up from €20 million a year ago.
However, the group cautioned that growing trade tensions – including a rise in US steel tariffs from 25 percent to 50 percent – and the weakening of the US dollar and Chinese yuan against the euro were eroding pricing power and softening orders.
“Following a period of resilience in Q2, the tariff uncertainty and weakening economic outlook has started to have an impact on demand,” Bekaert said.
The company now expects slightly lower full-year 2025 sales on a like-for-like basis, with an underlying EBIT margin of between 8.0 percent and 8.5 percent, down from 8.8 percent in the first half.
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