2022/23 UHP All Season Tyre Test

For dry braking, I drive the test vehicle at an entry speed of 110 km/h and apply full braking effort to a standstill with ABS active on clean, dry asphalt. I typically use an 100–5 km/h measurement window. My standard programme is five runs per tyre set where possible, although the sequence can extend to as many as fifteen runs if conditions and tyre category justify it. I analyse the full set of runs and discard statistical outliers before averaging. Reference tyres are run repeatedly throughout the session to correct for changing conditions.

For dry handling, I drive at the limit of adhesion around a dedicated handling circuit with ESC disabled where possible so I can assess the tyre's natural balance, transient response, and limit behaviour without electronic intervention masking the result. I usually complete between two and five timed laps per tyre set, depending on the circuit, tyre type, and consistency of conditions. I exclude laps affected by clear driver error or obvious environmental inconsistency. Control runs are carried out frequently throughout the session, and I often use multiple sets of control tyres so that wear on the references does not become a meaningful variable. For more track-focused products, I also do endurance testing, which is a set number of laps at race pace to determine tire wear patterns and heat resistance over longer driving.

Objective data is only part of the picture, so I also carry out a structured subjective handling assessment at the limit of adhesion on a dedicated dry handling circuit. I score steering precision, steering response, turn-in behaviour, mid-corner balance, corner-exit traction, breakaway characteristics, and overall confidence using a standardised 1–10 scale used consistently across my testing. The final assessment combines numeric scoring with written technical commentary. I complete familiarisation laps on the control tyre before evaluating each candidate.

For wet braking, I drive the test vehicle at an entry speed of 88 km/h and apply full braking effort to a standstill with ABS active on an asphalt surface with a controlled water film. I typically use an 80–5 km/h measurement window to isolate tyre performance from variability in the initial brake application. My standard programme is eight runs per tyre set where possible, although the sequence can extend to as many as fifteen runs if conditions and tyre category justify it. I analyse the full set of runs and discard statistical outliers before averaging. To correct for changing conditions, I run reference tyres repeatedly throughout the session — in wet testing, typically every three candidate test sets.

For wet handling, I drive at the limit of adhesion around a dedicated handling circuit. I generally use specialist wet circuits with kerb-watering systems designed to maintain a consistent surface condition. ESC is disabled where possible so I can assess the tyre's natural balance, transient response, and limit behaviour without electronic intervention masking the result. I usually complete between two and five timed laps per tyre set, depending on the circuit, tyre type, and consistency of conditions. I exclude laps affected by clear driver error or obvious environmental inconsistency. Control runs are carried out frequently throughout the session, and I often use multiple sets of control tyres so that wear on the references does not become a meaningful variable.

Objective data is only part of the picture, so I also carry out a structured subjective handling assessment at the limit of adhesion on a dedicated wet handling circuit. I score steering precision, steering response, turn-in behaviour, mid-corner balance, aquaplaning resistance, breakaway characteristics, and overall confidence using a standardised 1–10 scale used consistently across my testing. The final assessment combines numeric scoring with written technical commentary. I complete familiarisation laps on the control tyre before evaluating each candidate.

For wet lateral grip testing, I use a circular track of fixed radius, typically between 30 and 50 metres, broadly aligned with ISO 4138 principles. The surface is wetted in a controlled and repeatable manner. I progressively increase speed until the maximum sustainable cornering speed is reached. I normally record multiple laps in both clockwise and counterclockwise directions to reduce the influence of camber, banking, or directional track bias. I then calculate average lateral acceleration and compare the result with the reference tyre.

For snow braking, I drive the test vehicle at an entry speed of 50 km/h and apply full braking effort to a standstill with ABS active on a groomed, compacted snow surface, measuring 45-5 km/h. I generally use a wide VDA (vehicle dynamic area) and progressively move across the surface between runs so that no tyre ever brakes on the same piece of snow twice. My standard programme is twelve runs per tyre set, although the sequence can extend further if the data justify it. I analyse the full set of runs and discard statistical outliers before averaging. The surface is regularly groomed throughout the session. To correct for changing snow surface conditions, I run reference tyres repeatedly — typically every two candidate test sets.

For snow traction, I accelerate the vehicle from rest on a groomed snow surface with traction control active and measure speed and time using GPS telemetry. I typically use a 5–35 km/h measurement window to reduce the influence of launch transients and powertrain irregularities. I use a wide VDA (vehicle dynamic area) and progressively move across the surface between runs so that no tyre ever accelerates on the same piece of snow twice. The surface is regularly groomed throughout the session. I complete multiple runs per tyre set and average the valid results. Reference tyres are run typically every two candidate test sets to correct for changing snow surface conditions.

For snow handling, I drive at the limit of adhesion around a dedicated snow handling circuit with ESC disabled where possible. The circuit is groomed and prepared after every run while tyres are being changed, so each set runs on a consistently prepared surface. I usually complete between two and five timed laps per tyre set, excluding laps affected by clear driver error or obvious environmental inconsistency. Because snow surfaces degrade more rapidly than asphalt, control runs are carried out more frequently — typically every two candidate test sets.

Objective data is only part of the picture, so I also carry out a structured subjective handling assessment at the limit of adhesion on a dedicated snow handling circuit. The circuit is groomed and prepared after every run while tyres are being changed, so each set runs on a consistently prepared surface. I score steering precision, turn-in behaviour, mid-corner balance, corner-exit traction, breakaway characteristics, and overall confidence on snow using a standardised 1–10 scale used consistently across my testing. The final assessment combines numeric scoring with written technical commentary. I complete familiarisation laps on the control tyre before evaluating each candidate.

To assess comfort, I drive on a wide range of road surfaces (often dedicated comfort tracks at test facilities) at speeds from 50 to 120 km/h, including smooth motorway, coarse surfaces, expansion joints, broken pavement, and sharp-edged obstacles. I evaluate primary ride quality, secondary ride quality, impact harshness, seat-transmitted vibration, and the tyre's ability to absorb sharp inputs. Ratings are assigned on a 1–10 scale relative to the reference tyre.

Rolling resistance is measured under controlled laboratory conditions in accordance with ISO 28580 and UNECE Regulation 117 Annex 6. The tyre is mounted on a test wheel and loaded against a large-diameter steel drum. After thermal stabilisation at the prescribed test speed, rolling resistance force is measured at the spindle and corrected according to the relevant procedure. The result is expressed as rolling resistance coefficient, typically in kg/tonne.