The exact dimensions of a tyre can be found on the sidewall printed mark. The graphic shows how to read properties and dimensions of the tyre:
Run flat tyres
The run flat feature uses a reinforced side wall that, in the event of the tyre bursting, holds it in shape, preventing it from springing out of the rim. This means that in the case of a flat, it's possible to drive a further 150 miles at 50 mph. All run-flat tyres have the RSC symbol (Run Flat System Component) on the sidewall. Run-flat tyres don`t need any special rims, but only function with vehicles that are equipped with a functioning air pressure control system.
Extra Load / Reinforced
Extra Requirements: Reinforced, RE, Extra Load or XL.
Van tyres / C-type
Marking on tyres with additional load capacity (e.g. vans, small transporters, small buses, off-road vehicles and fast cars with V tyres). The important factor here is the higher load index number. Reinforced tyres require more air pressure than the standard version of the same tyre.
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