Why Cold Weather Affects Tyres

The cold changes how materials behave. Tyres are made from a rubber compound designed for a particular temperature range. As the temperatures get colder, the rubber becomes stiffer with reduced grip.

In winter, roads also stay wet for longer, increasing braking distances. Combined with more ice, frost, and standing water, it leads to less traction, longer stopping distances, and more tyre wear.

Generally, most seasonal tyres follow the “7°C rule”. This is the dividing line between summer and winter tyres, determining when they behave differently.

Tyre Pressure in Winter

You might not imagine tyre pressure would change in winter. However, the colder air causes air to contract: tyre pressure drops 1-2 PSI for every 10°C decrease. So, if you last pumped up your tyres in the depths of winter, it can be a substantial drop.

Several issues are caused by under-inflated tyres:

• Sluggish steering
• Increased wear
• Poor fuel economy
• Longer braking distances

Monitoring tyre pressure in cold weather isn’t complicated. Just check your tyre pressure every 2-3 weeks in winter, not monthly. Always check your tyres when the temperature drops sharply.

Read the manufacturer’s PSI guidelines to avoid over- or under-inflating your tyres. It’s found either in the handbook or the door sticker. Don’t overinflate your tyres “just in case,” not only does it reduce grip, but it can cause other issues.

Tread Depth: Why It Matters Even More in Winter

The UK law states that the minimum tyre tread depth is 1.6 mm. But leaving such thin margins can drastically increase stopping distance, even leading to crashes in icy conditions.

The recommended tyre tread depth for winter is 3 mm on wet, icy, or slushy roads. The thicker, deeper treads clear water, preventing aquaplaning (when your car slides uncontrollably).

If you can go thicker, even better. An 8 mm tread is best for water clearance. As a general rule, if the outer rim of a 20p is obscured by the grooves of the tyre, it’s legal (even better if it goes halfway in).

Winter Tyres vs All-Season Tyres in the UK

You might have heard of specialist winter tyres for UK roads. These tyres are designed for the winter climate. But they’re not the most common option. Drivers usually opt for all-season tyres.

Here’s a quick comparison:

Winter tyres

• Softer compound, more sipes, best below 7°C.
• Excellent for snow, frost, rural areas, and hilly regions.

All-season tyres

• Balanced for year-round use.
• Good for wet roads, cold rain, and occasional frost.
• Ideal for most UK urban areas.

Generally, if you’re in the Midlands, southern England, or London, all-season tyres are fine. Drivers in Scotland, northern England, or rural Wales may want to consider winter tyres.

Tyre Checks to Do Every Winter

Don’t ignore your tyres when the temperature drops. It’s sensible to perform a winter driving tyre check to ensure everything is correct.

Here’s a quick checklist:

• Check your tyre pressure every couple of weeks.
• Do a quick tread depth check once a month.
• Look for small cracks, as cold weather can harden the rubber.
• After any pothole hit, check for cuts, bulges, or nails.
• Make sure the valve caps are on properly.
• If the car pulls to one side, get the alignment checked.

When to Replace Your Tyres Before (or During) Winter

One of the big questions drivers ask is when to change their tyres. Either from summer tyres to winter tyres or just a set of older tyres.

You should replace your tyres if:

• Tread is under 3mm in winter.
• Sidewall cracks appear.
• Pressure drops repeatedly.
• You feel vibration or pulling (alignment).

Winter is the worst time to gamble on borderline tyres. If your car slides or drifts, it can lead to serious damage (and even personal injury).

Don’t take chances with winter tyres. If you’re unsure whether your set is up to the job, come and see us. It’s quick, it’s thorough, and it gives you peace of mind when the roads turn cold and slippery.