Flat Tyre and No Spare Wheel: What Should You Do in the UK?
You have a flat tyre, you have opened the boot, and there is no spare, just a repair kit, a strange narrow wheel, or nothing at all. The good news is you still have clear options, and none of them involve panicking at the roadside. This guide walks you through what to do first, what your realistic choices are, and how to get moving again safely.
With a flat and no spare, get yourself and the car to a safe place first. Then choose from three realistic options: a tyre sealant kit (small tread punctures only, and only as a temporary fix), driving a short, limited distance if the car has run-flats or a space-saver, or calling a mobile tyre service or breakdown provider to come to you. Do not keep driving on a deflated standard tyre. On a motorway, get behind the barrier and call for help rather than attempting anything yourself.
Flat tyre and no spare: what to do first
Stop somewhere safe before you do anything else. Get the car off the live carriageway if you can, onto a driveway, car park, verge, or the hard shoulder or emergency area on a motorway, then switch on your hazard lights. Only once you are in a safe spot should you work out which option fits your situation.
There is no legal requirement in the UK to carry a spare wheel or tyre. What the law does require is that the tyres actually fitted to your car are roadworthy, meaning at least 1.6mm of tread across the central three-quarters of the tyre, right around it, and free from dangerous cuts or bulges, as set out in the Highway Code’s vehicle maintenance guidance. So the question is not whether you have broken a law by having no spare, it is simply how to get back on the road safely.
Why your car probably has no spare wheel (check your boot)
Many new cars are sold without a spare, because leaving it out saves weight and boot space and helps with fuel economy and electric-vehicle range. In its place, manufacturers fit one of a few alternatives. Lift the boot floor and check which one you have, ideally before you ever need it:
Knowing which of these you have is the single most useful thing you can do, because it decides your options in the next section.
Your options with a flat and no spare: a quick comparison
Here is how the realistic choices compare. The right one depends on what caused the flat and what your car carries.
| Your Situation | Best Option | Why | Next Step |
|---|---|---|---|
| Small puncture in the tread, repair kit on board | Use the sealant kit, then get it inspected | Sealant can temporarily seal a small tread hole. | Drive gently to a tyre fitter or call a mobile fitter. |
| Sidewall damage, a large gash or a blowout | Do not use a repair kit; call for help | Sealant cannot safely seal sidewall damage or a large opening. | Arrange a mobile tyre replacement or vehicle recovery. |
| Car has run-flat tyres | Drive on within the manufacturer’s limit | Reinforced sidewalls can support the vehicle for a limited distance. | Head directly to a tyre fitter and do not exceed the stated speed or range. |
| Space-saver wheel available | Fit it for a short, slow journey | A space-saver is a temporary wheel and is not designed for normal driving. | Replace or repair the proper tyre as soon as possible. |
| No repair kit, run-flat tyres or spare wheel | Call a mobile tyre fitter or breakdown provider | There is no safe do-it-yourself option available. | Provide your exact location and tyre size when calling. |
| Slow puncture still holding some air | Do not rely on it; get the tyre checked | A slow puncture can worsen or fail without warning. | Arrange an inspection and have the tyre repaired or replaced. |
| Stranded on a motorway | Move to a safe place and call for help | Attempting roadside tyre work on a motorway can be extremely dangerous. | Wait behind the safety barrier and call 0300 123 5000. |
Using a tyre sealant or repair kit: what it can and can’t fix
A repair kit is a temporary get-you-going measure, not a permanent repair. The sealant is pushed into the tyre through the valve to plug a small hole in the tread while the tyre stays on the wheel, and the compressor reinflates it enough for a short, careful drive.
It has real limits. A kit only stands a chance with a small puncture in the tread area. It cannot seal a sidewall cut, a large gash, or a blowout, and it does not make the tyre roadworthy for the long term. As TyreSafe explains, a proper repair follows the British Standard BS AU 159, which means the tyre coming off the wheel to be inspected inside and out, something a roadside kit cannot do. Treat sealant as a short bridge to a fitter, then have the tyre properly assessed. If you would rather not drive on a sealant-filled tyre at all, a mobile technician can come to you instead.
Run-flats and space-savers: how far and how fast can you go?
Both let you keep moving, but only within strict limits, and neither is a normal tyre.
Run-flats have reinforced sidewalls that hold the car up after a loss of pressure, so you can drive on to a safe place or a fitter. The distance and speed are set by the manufacturer, and are commonly quoted as up to around 50 miles at up to around 50 mph, though your handbook is the one that counts. Do not push past the stated range, because the sidewall is working hard and can break down. Because a run-flat can hide damage picked up after the puncture, manufacturers such as Pirelli generally advise replacing rather than repairing them, subject to inspection.
Space-savers are the narrow temporary spares some cars still carry. They are built for short, slow journeys to a fitter, usually with a maximum speed printed on the wheel itself, often around 50 mph. Fit it, keep your speed down, avoid long trips, and change back to a full tyre as soon as you can. If your car uses a tyre-pressure monitoring system, expect a warning light until the correct wheel and pressure are restored.
Can you drive on a flat tyre?
No. Driving on a fully deflated standard tyre, even a short distance, can destroy the tyre and often damages the wheel rim too, turning a repairable puncture into a guaranteed replacement and a bigger bill. The rubber overheats, the sidewall gets crushed between the rim and the road, and the inner structure breaks down.
If the tyre is flat and you have no safe temporary option, it is better to stop, stay safe, and call for help than to limp along and cause more damage. A short, slow move to get fully clear of danger is one thing; trying to drive any real distance on a flat is another.
Stranded on a motorway or fast road: the safe steps
A motorway is the one place where you should not attempt anything with the tyre yourself. Following National Highways’ guidance, the priority is to get out of the way of traffic and then call for help:
Do not attempt repairs at the roadside on a motorway, and do not place a warning triangle on the carriageway there, it is too dangerous. On a smart motorway there may be no hard shoulder, so look for the orange emergency refuge areas and stop in one if you can. If you cannot get out safely, stay belted in with your hazard lights on and call 999.
Getting help that comes to you in Kent
If you are not on a motorway, or once you are safely behind the barrier, the quickest route back is often a mobile fitter who brings the tyre to you. For drivers around Dover and across Kent, K1 Dover Tyres can carry out a mobile puncture inspection and repair at your location, or supply and fit a replacement tyre where you are if the tyre cannot be saved, with an average arrival of around 30 minutes across Kent depending on your exact location, traffic and demand.
Two things speed up the callout: your exact location (a postcode or a live pin) and your tyre size (the numbers on the tyre sidewall, such as 205/55 R16). New tyre fitting is advertised from £49, with the final price depending on the tyre size, brand, how many you need and the time of service, and you get an upfront quote before any work begins. If the car is undriveable, breakdown recovery can move it to safety.
