My biggest question is there an adapter of some sort that i can get to add front disk brakes to this 26" Mongoose Hex Mens Fitness Bike, Mongoose Mens Bike, Matte Blue, 26" Mongoose Bike

I'm doing something to this bike, and i'd prefer to have stronger brakes.

Also, what can i do about getting stronger rear breaks? In this case i cannot use disc brakes in the back.