Run-Flat Tyres Explained — Pros, Cons, and Whether They're Right for You

Run-flat tyres are constructed with reinforced sidewalls that support the weight of the vehicle even when the tyre loses air pressure. After a puncture, most run-flat tyres allow you to continue driving at up to 50mph for approximately 50 miles — enough to reach a garage or safe stopping point without needing to change a wheel by the roadside. Many modern BMWs and MINI vehicles are fitted with run-flats as standard, which is why they often come with no spare wheel.

The main advantages of run-flat tyres are improved safety in a sudden blowout situation (the vehicle remains more controllable) and the elimination of the need to change a tyre in difficult or dangerous locations. The disadvantages are cost — they typically cost significantly more than equivalent standard tyres — and ride comfort, as the stiffer sidewalls transmit more road noise and vibration into the cabin.

Run-flat tyres cannot generally be repaired after a puncture and must be replaced. They also require a Tyre Pressure Monitoring System (TPMS) to alert the driver to a pressure loss, since the stiff sidewall means the tyre does not visibly deflate. Castle Mobile Tyres can supply and fit run-flat replacements on request — call us for pricing on your specific size.