Run-flat tyres feature reinforced sidewalls that support the weight of the vehicle even when tyre pressure is completely lost. This allows you to continue driving at reduced speed — typically no more than 80 km/h for up to 80 kilometres — to reach a safe location or garage without the need to change a tyre at the roadside. Many newer BMW, MINI and Mercedes models are fitted with run-flat tyres as standard.
The trade-offs are real though. Run-flat tyres are noticeably firmer than standard tyres, contributing to a harsher ride quality. They are also significantly more expensive and less widely available than standard tyres, which can create problems in an emergency. Because they show no visible signs of deflation after a puncture, vehicles fitted with run-flats must have a tyre pressure monitoring system to alert the driver to pressure loss.
Another important consideration is that most run-flat tyres cannot be repaired after a puncture — they must be replaced. This means the long-term running cost is higher. If your vehicle came with run-flat tyres and you are considering switching to standard tyres, consult a specialist first, as vehicles designed around run-flats may not have space for a spare wheel. Royal Mobile Tyres Cardiff stocks run-flat tyres across a range of sizes and brands.
