I recently bought a Mongoose XR200; it came with front disc brakes and rear linear pull brakes. I use my (front) disc brakes all of the time, and now I'd like to put disc brakes on the back. I'm pretty sure this bike has the correct mounting for rear disc brakes (see pictures). The problem is that I need the exact same disc brakes that are on the front, on the back as well. If you could identify the disc brakes on the front (see pictures), or tell me how I would go about doing so, it would help me out a lot.