If a tyre blows out at speed, the instinct to brake hard is exactly wrong. Hard braking or swerving can spin the car. Instead, hold the wheel firmly, keep the car pointing straight, lift off the accelerator and let the car slow on its own before easing onto the hard shoulder or verge. Staying calm for those few seconds is what keeps the car stable.
The step-by-step response
Commit this sequence to memory now, because there's no time to think it through when it happens:
- Grip the wheel firmly with both hands, as the car will pull towards the blown tyre.
- Keep straight. Don't yank the wheel or brake sharply.
- Ease off the accelerator and let the car slow gradually.
- Steer gently to a safe place once you're slow enough.
- Hazards on, and get out of the car away from traffic if you're on a fast road.
Why braking is dangerous
A blown tyre is already dragging that corner of the car, pulling it off line. Add hard braking and you risk locking up and losing control entirely, particularly if it's a front tyre and you're mid-corner. Smooth, gentle inputs keep the car balanced while it scrubs off speed naturally, which is the safest way to bring it under control. The physics are counter-intuitive, which is exactly why rehearsing the right response in advance matters, your instinct will be to brake, and you need to override it.
Once you've stopped safely
On a motorway, get behind the barrier and follow our hard-shoulder safety advice. The Highway Code is clear that you shouldn't attempt a roadside wheel change on a live carriageway, it's far too dangerous. Get everyone out of the car on the side away from traffic and up the verge, leaving any animals in the car unless you can keep them under proper control on the verge, then call for help and wait in a safe place rather than near the vehicle.
Prevent the next one
Most blowouts trace back to under-inflation, worn or old tyres, or hidden impact damage, see our guide to causes and prevention. Keeping pressures correct and tyres in good condition is the single best defence, because heat from a soft tyre is what triggers most failures.
A monthly pressure check and a quick look for cracks and bulges removes most of the risk before you ever set off. Do the same check before any long motorway run, when the tyres will be hot and loaded for hours; our long journey checklist covers the rest.
Warning signs in the days before
Most blowouts give notice, and the notice is usually ignored because the car still drives. A tyre does not normally go from healthy to burst in one moment; it goes from soft, damaged or old to burst under heat and speed. These are the signs worth acting on the same week you notice them.
- A pressure warning that keeps coming back. Topping up and driving on masks a slow leak that is heating the tyre every trip.
- A bulge or blister on the sidewall. The cords inside have broken, usually from a pothole or kerb, and the air is pushing through the rubber. That tyre can fail at any time.
- Cracking between the tread blocks or around the sidewall. The rubber has aged and hardened.
- A new vibration or shimmy at speed. Often a balance or wheel problem, but sometimes a tyre starting to separate internally.
- A tyre that runs hotter than its partner. After a motorway run, a tyre that is noticeably hotter to the touch than the one on the other side is working harder, usually because it is soft.
None of these is a reason to panic, but all of them are a reason to have the tyre looked at before the next long, fast journey rather than after it.
Motorway, A-road or town: where you stop changes
The driving response is the same everywhere; what changes is where you can safely put the car and yourself afterwards.
Motorway
Get to the hard shoulder or an orange emergency area, pull as far left as you can, hazards on, leave by the passenger side and get behind the barrier with everyone; leave animals in the car unless you can keep them under proper control on the verge. Call National Highways on 0300 123 5000 or use the SOS phone.
If you cannot get out of a live lane, keep belts on, hazards on, and call 999. The Highway Code breakdown rules cover this in detail.
Dual carriageway or fast A-road
There is often no hard shoulder, so aim for a lay-by, the next exit or a side turning if the car still handles safely; otherwise pull as far left as you can with hazards on. Get everyone out on the side away from traffic and well back from the car. A warning triangle is useful on an ordinary road but must not be used on a motorway.
Town or residential street
Pull in where the car is not blocking a junction or a bus lane, hazards on, and you can usually wait with the car. This is the setting where a mobile fitter can often replace the tyre where you stopped, as long as it is legal and safe to park there (not a red route, bus lane or junction).
Can you drive after a blowout?
No, not on the blown tyre, not even slowly. A burst tyre has no structure left. Rolling on it shreds the remains, grinds the wheel rim on the road and can damage the brake, the wheel arch liner and the tyre pressure sensor, turning a tyre bill into a wheel and sensor bill. It also makes the car steer unpredictably.
Our guide to driving on a flat covers the damage in more detail.
The exceptions are narrow. Run-flat tyres are built to carry the car for a limited distance at a limited speed after losing pressure, which can get you off a motorway to a services; check the handbook for the figure.
On a motorway, if the blowout leaves you in a live lane and the car can still move, keep going slowly with hazards on to the next emergency area, hard shoulder or exit, even on a ruined tyre; if it cannot, stay in the car with seat belts on and hazards on and call 999.
Once stopped, do not fit the spare on a motorway or a fast road. Wait for help. If you have a space-saver spare and are somewhere safe, it will get you home at up to 50mph, but check its pressure first, because it may have been in the boot for years.
After a blowout: check the wheel and the other tyres
A blowout often takes more than the tyre with it, and it usually points at a cause the other tyres share. Before you drive off on a new tyre, three things are worth checking.
| Check | Why |
|---|---|
| The wheel rim | Rolling on a flat, even briefly, can bend or crack an alloy. A damaged rim may not seal a new tyre. |
| The TPMS sensor | It sits inside the tyre on the valve and is easily broken when a tyre disintegrates. |
| The other tyre on the axle | If the burst tyre was old, soft or worn, its partner probably is too, and a new tyre paired with a tired one unbalances the grip. Read replacing tyres in pairs. |
| Arch liner and bodywork | Flailing rubber at speed tears plastic liners and can damage wiring behind them. |
Ask the fitter what they think caused it. Under-inflation, age and impact damage each leave different evidence on the carcass, and knowing which one it was tells you whether the remaining tyres need attention now or can wait.
Blown a tyre? We'll come to you
Our burst tyre service runs from one base at Brent Cross, NW2, mainly across London and the Home Counties; further afield, call and we will tell you whether we can take the job. Evenings, nights and weekends are covered when the diary allows, at the same price as a weekday job. We give you an arrival time when you call and fit a replacement once the car is somewhere safe, where your size is available.
