Run Flat Tires are still a mystery to many drivers. Some of us use them, but don’t understand how they actually work, while others avoid them altogether. Car-Addicts.com comes with explanations.
Flat tires floated like a black cloud over the drivers. Meanwhile, ROF tires were invented, or Run-on-Flat tires, which can provide mobility without much effort even after a flat tire. But this raises several problems. How different are Run Flat tires compared to conventional ones? Can these be installed on any car? How many miles will you still be able to drive? Are Run Flat tires still safe after a flat tire?
Tires that provide mobility after a puncture have been invented in the 30s, but modern Run Flat tires are now totally different. Car-Addicts.com made a list with five key elements associated with these type of tire.
What do Run Flat tires have in addition?
Compared with standard tires, One Run on Fat tire has a special structure that allows it to operate at limited capacity on a limited distance, to avoid vehicle immobilisation in case of failure. The tire seen in the image below has a support ring and reinforced sidewalls that prevent rim damage in case of a complete loss of pressure. It provides limited mobility for a distance of up to 50 miles (80 kilometers).
What happens when you puncture a Run Flat tire?
Run Flat tires were designed to provide safety when there is a sudden loss of pressure. While a flat tire on a conventional vehicle can lead to loss of control, Run Flat tires promise to provide more control in this situation.
Run Flat tire manufacturers recommend equipping these type of tires on vehicles that have tire pressure sensors to quickly warn the driver of a possible failure.
Thus, if any problem appears on your Run Flat tires, check their status and their pressure integrity and then go carefully to a vulcanisation.
How to drive a car with Run Flat tires after a puncture
Suppose you’re driving a car with Run Flat tires and you just went flat. You’ve checked the vehicle and tire integrity and have gone on the road again. What should you do next? Tire manufacturers say that Run Flat tires can provide between 30 miles (50 km) and 95 miles (150 kilometers) of mobility, provided that the driver does not exceed 50 mph (80 km/h) on normal areas and 30 mph (50 km/h) on slippery surfaces.
Whatever the case, you must ensure that tires are still suitable pressurised before setting off. You should note that there are situations where you can’t continue to drive even with Run Flat tires.
You should also read: Tire Maintenance – 5 Common Mistakes
Can a Run Flat tire be repaired after a puncture?
Any tire, either Run Flat or conventional, must be carefully inspected after a failure. Tire manufacturers say that a puncture on the running surface of the tire can be repaired as long the tire wasn’t driven on flat or with an excessive low pressure. In case of damage to the lateral side, the tire can’t be repaired.
Also, it is recommended that tires with high speed index (higher than H) should not be repaired, regardless of the damage suffered. The actual run with a flat tire, even if it’s Run Flat, will lead to the ultimate destruction of the tire.
What changes a Run Flat tire also implies?
Besides the complete elimination of the spare wheel, a Run Flat tire requires installation in a specialised workshop and all repairs must be also performed in such a workshop. Removing the spare wheel allows compensation of the mass difference between conventional and Run Flat tires.
Only certain Run Flat tire manufacturers ensures compatibility with any rim model, while other models are not universally compatible. Although technically possible to mount on any car, it is recommended that only models designed for Run Flat tires to use them.
Run Flat tires system explained on Car-Addicts.