I have an old older (not too old) bike that already has disc brakes, but I would like to replace them with a totally new set and new rotors.
How can I determine if a given replacement (caliper and rotor) is plausible my bike, and if so if an adapter will be needed or not, and if it is, what to get?
For the particulars, I have a 2000 GT Zaskar and one brake setup I am considering for example Hope v4 with 203mm front rotors and 183mm rear and would like to know if this would even fit.
![enter image description here]