Inboard brakes definition
Most cars have the brakes associated with the wheel. Drum brakes , for instance, are located in the wheel hub itself. Disc brakes are found attached to the wheel. However, inboard brakes are not located within the wheel. Instead, they are found attached to the differential housing or axle shaft. Thus they are generally located only on the rear of the vehicle. Some racing cars (i.e., Formula 1) have them on the front as well. Inboard brakes mean a reduction in unsprung weight and usually better cooling.