I have a 2008 Giant XTC 01 that came with disc brakes. Those brakes have been difficult to service throughout my time with the bike, now the pads on the back are worn out the fluid lines on the front has ruptured. As such, I'm ready to consider replacing the disc brakes with more easily serviced calipers or cantilevers. The problem is, I'm not sure whether my frame and wheels will support this style of brake. Attached are images of the fork, wheels, and frame.