Run-flat tyres let you drive up to 50 miles after a puncture. We break down the pros, cons, cost difference and how our mobile tyre fitting service handles run-flats.
Run-flat tyres (also called Zero Pressure Tyres or ZP tyres) are designed with reinforced sidewalls that support the vehicle's weight even when the tyre is fully deflated. After a puncture, they allow you to drive at up to 50mph for up to 50 miles — enough to reach a tyre centre safely.
How Do Run-Flat Tyres Work?
The reinforced sidewall — typically made of stiff rubber — takes the load from the vehicle when tyre pressure drops to zero. Without this reinforcement, a flat tyre collapses immediately. With it, the tyre maintains its shape and basic function long enough to reach safety.
Pros of Run-Flat Tyres
- No need to change a tyre on the roadside
- Safer in blowout situations — car remains more controllable
- Eliminates the spare wheel, saving weight and boot space
- Factory-fitted on many BMW, Mini and Volkswagen models
Cons of Run-Flat Tyres
- More expensive than equivalent standard tyres (typically 20–40% more)
- Harsher ride quality due to stiffer sidewalls
- Cannot be repaired after a puncture — must be replaced
- Not all garages or mobile fitters stock run-flat sizes
Mobile Fitting for Run-Flat Tyres
Totally Mobile Tyres stocks a wide range of run-flat tyre sizes and can fit them on-site with the same quality as any standard tyre. The process takes slightly longer due to the stiffer construction, but our equipment handles it without issue.
If your car was designed for run-flats (no spare wheel supplied), don't fit standard tyres without understanding the implications. Your vehicle's TPMS was calibrated for run-flat behaviour — standard tyres change the safety dynamic.
