19/06/2026
🏁 Why tyre compound selection can make or break your track time
Following our recent announcement that the KINGTYRE FULLGAS RACING TEAM will be competing at the 24 Hours of Catalunya while testing new tyre compounds and constructions, we thought we'd take a closer look at one of the biggest challenges in endurance racing: choosing the right compound for the conditions.
To many people, tyre compounds are simply described as "soft", "medium" or "hard". In reality, the science is far more complex.
Every tyre is designed to operate within a specific temperature window. The goal is simple: keep the tyre working in that window for as long as possible while delivering consistent grip, stability and durability.
But what happens when you get it wrong?
The tyre is too hard for the conditions
Many riders assume a harder compound will always last longer. That's not necessarily true.
If a compound is too hard for the ambient temperature, track surface or riding style, it may struggle to generate enough heat to reach its optimum operating range.
When this happens, the tyre can begin to slide microscopically across the track surface instead of conforming to it. The result is reduced grip, increased movement within the contact patch and excessive stress on the tread surface.
Ironically, this can lead to accelerated thermal degradation. The tyre isn't working efficiently, generating heat in the wrong places and creating hotspots that break down the rubber compound. Riders experience reduced confidence, inconsistent grip and a tyre that may lose performance long before its tread is worn away.
The tyre is too soft for the conditions
At the opposite end of the spectrum, a compound that's too soft can generate excellent grip initially, but may overheat once race pace increases.
This is particularly relevant at Catalunya, where track temperatures can exceed 40°C during the afternoon.
As temperatures rise, the rubber becomes more mobile and the forces generated during acceleration, braking and cornering begin to physically tear away the tread surface. This is known as mechanical degradation.
The tyre may feel fantastic for the first few laps, but performance can quickly decline as the tread wears, deforms and loses consistency. In endurance racing, where tyres must often survive multiple stints, this can have a significant impact on race strategy.
Why there is no universal 'best' compound
The correct tyre isn't determined by track temperature alone.
Rider style plays a huge role. A rider who is aggressive on corner exit and relies heavily on acceleration will stress the rear tyre very differently from a rider who carries more corner speed and uses smoother throttle inputs.
Track surface is equally important. Some circuits are highly abrasive and physically wear the tyre. Others are smoother but generate higher temperatures. Catalunya presents its own unique challenge, combining long loaded corners, heavy braking zones and significant temperature fluctuations between day and night.
Even within the same team, two riders can prefer different tyre characteristics depending on how they generate lap time.
This is why we race
For KINGTYRE, endurance racing is more than competition. It is one of the most demanding tyre development laboratories in the world.
The data collected at Catalunya helps our engineers understand how compounds behave under extreme loads, varying temperatures and prolonged use. Every lap teaches us something about grip generation, heat management, wear characteristics and construction stability.
The challenge is never simply making a tyre softer or harder.
The challenge is creating a tyre that delivers predictable grip, manages heat efficiently and maintains performance hour after hour, lap after lap.
That's what we'll be working towards when the lights go out in Barcelona. 🏍️🔥
