Whether a vehicle is fitted with run-flat tyres or the driver is evaluating them, understanding the distinction from standard tyres is important, since it affects cost, comfort and the response to a puncture.
How run-flats operate
Run-flat tyres incorporate reinforced sidewalls that support the vehicle’s weight with no air pressure, permitting continued travel — typically up to around 50 miles at reduced speed — to reach a safe location. Vehicles so equipped generally carry no spare wheel.
The trade-offs
- Safety: no sudden loss of control following a blowout, and no roadside wheel change.
- Cost: higher purchase and replacement prices.
- Comfort: the stiffer sidewall can produce a firmer ride.
- Repairability: run-flats frequently cannot be repaired safely and require replacement.
Making the choice
The manufacturer’s original specification should be retained unless there is good reason to deviate, since the suspension and tyre-pressure monitoring are matched to it. Mixing run-flat and standard tyres is not advised.
Maintenance applies either way
Whichever is fitted, tread and pressure remain critical — see how to check tyre tread and pressure. When replacement is required, FixMyTyreNow, part of the Londonos group, can source and fit the correct specification at the customer’s location.