Runflat tyres are made with reinforced sidewalls which carry the weight of the vehicle in the event of pressure loss. This 'Self Supporting' Tyre Technology is typically found on BMWs and Minis and enables you to continue your journey with a flat tyre for up to 50 miles at up to 50 miles an hour.

Some vehicles require tyres that are rated to carry a higher load and therefore have a higher inflation pressure. This information can be found on the tyre sidewall marking and is marked as Extra Load (XL) or Reinforced (RF).

When buying winter tyres, it is common to go down a speed rating due to reduced speeds when driving in adverse weather conditions.