Worn tyres and aquaplaning: what is the connection?

Aquaplaning occurs when a tyre loses grip on a layer of water. Tread depth, speed, water and the condition of the tyre all affect the risk.

Why tyre wear matters

The grooves in the tread help channel water away from the contact patch. As the tyre wears, its ability to clear water may decrease, especially on stretches where water has pooled. Aquaplaning depends on several factors, including speed, water depth, pressure, load and tyre characteristics; there is no single threshold that makes every wet road safe.

A tread depth close to the legal minimum can provide less effective wet-weather performance even before it reaches that limit. Check tread depth and wear at several points, as well as for cuts, deformation and differences between wheels. If you are unsure how to measure the tread or notice uneven wear, ask a tyre specialist to check it.

Reduce the risk with careful driving

In heavy rain, reduce your speed, increase the gap and keep your movements smooth. Avoid sudden acceleration, braking and steering, especially when crossing puddles or rutted sections of road. If the steering feels light or the car seems to float, stay calm, ease off the accelerator gradually and keep the car on course without sudden manoeuvres; once grip returns, slow down safely.

Do not use cruise control in conditions where the vehicle handbook advises against it, and do not attempt test braking. If visibility or standing water makes the journey unsafe, stop in a protected area. Check tyre pressures when cold, as specified by the manufacturer: do not underinflate or overinflate tyres to compensate for wear.

Arrange regular tyre checks

Replace damaged or excessively worn tyres and choose the specified sizes and ratings. If you replace a pair, ask a professional to determine the correct axle based on the vehicle’s technical requirements. Keep pressures and maintenance up to date before wet-weather periods and journeys.

If the steering feels light on water, do not brake or steer sharply: ease off the accelerator gradually and keep the car on course until the tyres regain contact. Then slow down and increase your following distance. In heavy rain, reduce speed before reaching puddles: worn tyres and excessive speed increase the risk.

Quiz Patente Ufficiale offers theory chapters, timed test quizzes and error review to help you study road safety and grip; check your tyres in accordance with the handbook and ACI guidance.