What You Don’t Know About Getting A Puncture
Friday, 25. May 2018
Most people are not aware of the way their car is set up to deal with a puncture. According to tyre maker, Continental drivers suffer a puncture once every 44,000 miles or 5 years. And much has happened over that period if you haven’t suffered a puncture over the last 5 year period.
Some drivers still think that they have a full sized spare in the boot and are shocked to find that there is just a puncture repair kit. Unfortunately, they only get to find this out when they get a puncture. It would, therefore, be wise to check as you never know when you will suffer a puncture.
The reason why we’ve moved to tyre repair kits via skinny emergency spares from full-sized spares is given as the need to reduce the weight of cars in order to improve fuel consumption. and reduce emissions. In fact, it is probably more to do with cost as a repair kit costs about £20 whilst a wheel and tyre will cost the manufacturer more than £100.
Some manufacturers will allow a skinny spare for an extra charge with space in the boot. To give the situation some perspective What Car carried out a survey of 251 new car models and found just 8% had full sized spares, space savers were standard on 30% and tyre repair kits were fitted to 55%. The rest were fitted with run-flat tyres.
So how does a repair kit work? Most consist of a sealant that is squirted into the punctured tyre via the valve with the help of a compressor connected to an in-car 12v socket. What they don’t always make clear is that you must drive the car soon after you’ve inflated the tyre in order to spread the sealant around the inside of the tyre.
You should be able to drive the car for up to 300 miles which should be ample to get out of trouble and to a tyre repairer in order to have the puncture repaired. The problem with the sealant is that it only works in one in five punctures. If the hole is more than 5mm wide or in the sidewall it won’t work.
The tyre will also deflate a day after repair. The sealant may also prevent the tyre from being repaired. Only if it is water based will you be able to repair the puncture as the repairer can flush out the sealant. Currently, Ford, Honda, Hyundai, Kia, Seat, Suzuki, VW and Volvo have repair kits in their cars that are water-based.
If you wanted to have a space saver wheel instead of the repair kit, research showed that only 52% of the cars that had a repair kit could have the repair kit swopped for a space saver wheel. Prices vary from £30 on a Kia Picanto to £275 on an Alfa Romeo Stelio SUV.
Space savers are only meant to be used temporarily, they only have 3mm of tread and whilst they shouldn’t be driven above 50mph there is no limit as to how far you can travel on these skinny wheels. Finally, there are run-flat tyres. They have extra-stiff sidewalls that are designed to resist the effects of deflation so you can continue your journey after a puncture.
Unfortunately, they are more expensive to buy and following a puncture you will need to change the tyre rather than have the tyre repaired. Some tyre fitters will repair run-flats but the manufacturers advise against it. They also make the ride firmer so you should test drive the car first before buying. You may find the ride too firm.
With so many people suffering blowouts as a result of potholes it is recommended that you have a spare in the car, even if it’s just a space saver. By Graham Hill
