Puncture With No Spare Tyre: Your Options Explained
Around four in five new cars sold in the UK leave the showroom without a spare wheel. Most drivers only discover this when they lift the boot floor at the side of a dual carriageway. Here is what your options actually are.
Do this now
- Get off the carriageway if you can. A shredded tyre is cheaper than a collision — keep driving slowly to a safe place if you must.
- Hazards on, everyone out of the car and behind a barrier if you are on a fast road. Do not attempt anything on the hard shoulder side of the vehicle.
- Check the boot floor for a space saver, a kit, or nothing at all — then call +44 7598 410801 and tell us which you found.
On this page
- First: work out what you actually have
- Tyre sealant kits: when they work
- When a sealant kit will not save you
- Run-flats: 50 miles at 50mph
- Space savers: the rules
- Mobile tyre fitter or recovery?
- The legal position on damaged tyres
- What to keep in the boot
First: work out what you actually have
Lift the boot floor. You will find one of four things, and each leads somewhere different:
- A full-size spare. Increasingly rare. Fit it and carry on normally.
- A space saver — a narrow steel wheel with a skinny tyre. Temporary, speed-limited, but it gets you to a tyre shop.
- A tyre repair kit — a bottle of sealant and a small 12V compressor. Works for some punctures and not others.
- Nothing at all, because the car has run-flat tyres, or because the space where the spare would sit is occupied by a subwoofer, a battery pack or simply moulded foam.
Manufacturers removed spare wheels for weight, cost and CO2 reasons, and on electric cars there is usually no physical room left once the battery is in. It is not a fault, but it does change what you can do at the roadside.
Tyre sealant kits: when they work
A sealant kit is genuinely useful in one specific scenario: a small puncture in the tread, from a nail or screw, with the object still in place or recently removed, and the tyre still on the rim. That covers a fair share of everyday punctures.
How to use one properly:
- Do not remove the nail. Leave it where it is — it helps the sealant plug the hole.
- Attach the bottle and compressor to the valve as instructed, and inject the full bottle.
- Inflate to the pressure on the door pillar sticker.
- Drive immediately at low speed for a few miles. The sealant needs the tyre rotating to spread and seal — leaving the car parked afterwards defeats the point.
- Stop and re-check the pressure. If it has dropped again, the repair has not held.
- Get to a tyre fitter the same day. Sealant is a get-you-there measure with a short life, not a repair.
Tell the fitter
Say you have used sealant when you book. It is messy to clean out, some garages charge for it, and it can affect TPMS sensors. Modern sealants are generally sensor-safe, but the fitter needs to know before the tyre comes off the rim.
When a sealant kit will not save you
Do not waste time or sealant on any of these — they need a new tyre and, usually, recovery:
- Sidewall damage. A cut, bulge or gouge in the flexible wall of the tyre. Sealant cannot hold there and the tyre is not legally repairable anyway.
- A cut or split longer than about 4mm, or damage outside the central tread area.
- The tyre has come off the bead. If the rim has dropped inside the tyre, no amount of sealant will re-seat it at the roadside.
- You drove on it flat. A tyre run flat for any distance has a destroyed internal structure even if it looks intact. It is scrap.
- Valve or wheel damage — a kerbed alloy that no longer seals, or a snapped valve stem.
- Two flat tyres. One kit, one bottle.
Pothole damage
A hard pothole strike often does both wheel and tyre, and can knock out the tracking or bend a suspension arm. If the car pulls hard or the steering wheel is now off-centre, do not drive it further than you must.
Run-flats: 50 miles at 50mph
Run-flat tyres have reinforced sidewalls that support the car's weight with no air in them. The standard manufacturer allowance is roughly 50 miles at up to 50mph, though check your handbook because some are rated lower, and heavily loaded cars get less.
Two things drivers get wrong:
- They keep driving beyond the limit "because it feels fine". Once the sidewall structure starts breaking down, failure is sudden.
- They assume a run-flat can be repaired. Most manufacturers say no once it has been run deflated, and many fitters will not touch them. Budget for a replacement.
Run-flats also need to be replaced with run-flats on most cars, because the suspension and stability systems are calibrated for them — and they are noticeably more expensive.
Space savers: the rules
If you have a space saver, fitting it is usually the fastest route out. Observe the limits:
- Maximum 50mph, marked on a sticker on the wheel itself.
- Limited distance — typically 50 to 70 miles. It is for reaching a tyre shop, not for finishing a holiday.
- Check the pressure. Space savers usually run at a much higher pressure than normal tyres, often around 60psi, and they lose air sitting in the boot for years.
- Braking, traction control and ABS behave differently with one narrow wheel fitted. Leave extra distance.
Some cars will not tolerate a space saver on a driven axle at all, particularly four-wheel-drive vehicles where the difference in rolling radius can damage the differential. Your handbook will say. If in doubt on an AWD car, recovery is the safer call.
Mobile tyre fitter or recovery?
| Situation | Better option | Why |
|---|---|---|
| Puncture at home or in a car park | Mobile fitter | Safe, static, and they can bring the right size |
| Motorway or dual carriageway | Recovery | No tyre work should happen beside live traffic |
| Unusual or performance tyre size | Recovery | A mobile van rarely stocks it; the car goes to the tyre |
| Wheel damage as well as tyre | Recovery | Needs a workshop, not a roadside fit |
| Two tyres down | Recovery | Usually kerb or pothole damage; check the suspension too |
| Locking wheel nut key missing | Recovery | Removal takes specialist tools and time |
If you are on the M27 or M3 hard shoulder, there is no version of this where changing a wheel yourself is the right decision. Our motorway breakdown guide covers where to stand and what to do while you wait.
The legal position on damaged tyres
Tyre offences are among the most heavily penalised vehicle defects in the UK. Driving with a tyre below 1.6mm of tread across the central three-quarters, or with a cut, bulge or exposed cord, carries a fine of up to £2,500 and three penalty points — per tyre. Four bad tyres is twelve points, which is a ban.
Insurers also take an interest. A collision on a tyre that was already illegal is a straightforward route to a disputed claim.
What to keep in the boot
- A 12V compressor of your own. The ones supplied with sealant kits are weak, and a compressor alone often gets a slow puncture home.
- A spare bottle of sealant, with the expiry date checked — the stuff has a shelf life of a few years.
- Your locking wheel nut key, which lives in the glovebox and is missing from a startling number of cars.
- A reflective jacket for every occupant, and a torch.
- Check your space saver's pressure whenever you do the other four. Nobody does this, and it is why so many space savers are flat when needed.
Stuck with a flat and nothing to fit?
If the sidewall has gone, the tyre has come off the rim or you are on a fast road, recovery is the safe answer. We're 24/7 across Southampton, Winchester, Portsmouth and Hampshire.
? Call +44 7598 410801Request a callback
Frequently asked questions
Can I drive on a flat tyre to get somewhere safe?
Do tyre sealant kits actually work?
How far can I drive on a run-flat tyre?
How fast can I drive on a space saver spare?
Is it cheaper to get a mobile tyre fitter or a recovery truck?