Definition
Run-flats eliminate spare tires on many modern performance sedans.
Stiffer sidewalls can reduce ride comfort versus conventional tires.
Automotive Wiki
Tires & Wheels
Run-Flat Tire
A tire designed to support vehicle weight briefly after air loss.
Related terms
- Tire CompoundThe rubber formulation determining grip, wear, and temperature range.
- Wheel OffsetThe distance from the wheel mounting surface to the centerline of the rim.
- Wheel BackspacingThe distance from the mounting surface to the inner edge of the rim.
- Plus SizingMounting larger-diameter wheels with lower-profile tires while maintaining overa…
- Tire PressureInflation pressure affecting contact patch, heat buildup, and wear.
- Treadwear RatingA UTQG number estimating tire life relative to a reference test tire.
Category: Tires & Wheels · Updated August 31, 2026