Disk
The advantage of the disk is that the disk is farther away from the water that can reduce the efficiency of the braking system. Second reason for disk is to prevent sticks and other foriegn objects from getting jambed in the wheel and frame.
Touring bikes and tandems typically will have the disk brake available on the rear wheel to better handle higher capacity loads and heat problems with long down hills that a road bike does not have.
Your comparing sports cars (road) to tractors (off road), Cadillac (touring), and Bus (tandems).
The advantage of the disk is that the disk is farther away from the water that can reduce the efficiency of the braking system. Second reason for disk is to prevent sticks and other foriegn objects from getting jambed in the wheel and frame.
Touring bikes and tandems typically will have the disk brake available on the rear wheel to better handle higher capacity loads and heat problems with long down hills that a road bike does not have.
Your comparing sports cars (road) to tractors (off road), Cadillac (touring), and Bus (tandems).