A Street track tyre made of high grip state-of-the-art material for maximum traction The Ecsta XS (eXtreme Street) (KU36) is Kumho’s Extreme Performance Summer tyre developed for passionate driving enthusiasts looking to make the most of their vehicle’s capabilities in competition, at the track or on the street. The Ecsta XS is designed to deliver Kumho’s ultimate level of dry road performance while maintaining wet traction.
The load rating (represented by the numerical value) is related to the maximum weight that tyre can carry. So in this case 105 would refer to a load capacity of 925kg, with most passenger vehicle load indexes range from 62 to 126.
In all instances the tyres load index must meet or exceed the value displayed on the vehicles placard.
The speed category symbol, for example 'S', indicates the maximum speed at which the tyre can carry a load corresponding to its load index. So in this case, 'S' would refer to a maximum speed of 180km/hour.
See the chart below for a full list of speed symbols and their applicable values.