Originally Posted by
Maelochs
You need a fork designed for discs. I have never seen a bolt-on/clamp-on conversion, and I am not sure I would trust one .... something about having my fork snap under hard breaking doesn't appeal to me.
If OP is asking about bolt-on MTB wheels, we can probably assume it's a steel fork.
Even if it was a carbon road fork, i can't imagne that the forces involved are strong enough to snap the end off the fork leg. Bikes with carbon forks and disc brakes
do exist.
The big issue is getting everything to line up right, and stay there, especially since you will probably have to 'adapt the adapters' to make it work.
Plus, cost. Pretty much any MTB over $400 from a major brand already has disc brakes, so OP's bike is probably cheap, or old, or both. Unless he's been given a disc setup, the cost of amassing the bits-n-pieces to make this work will probably be much more than he expects.