Brakes are essential for your car. Vehicle brakes must be kept in top condition for this reason. They must therefore be repaired frequently and as soon as the manufacturer suggests.
You should service them more frequently if your 30 Inch Rims conditions are more stop-and-go, such in cities.
In the majority of modern cars, a brake condition warning system is standard. If this triggers, act immediately. Take your car to a qualified mechanic to get this safety-essential component fixed.