The A.driveR1 is Yokohama's entry level low profile sports performance tyre. It is surprisingly good for the money. Upgrade your car's performance, especially if you upgrade its wheels. The "R1" is an aggressive, stylish low profile tyre which gives good value performance. If your car is powerful and gets unintended wheel spin, maybe this tyre will solve the problem. It suits hot hatches, turbo cars and some larger sports sedans.
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.