No you can't. The flange or spline that the rotor disc mounts to is a solid part of the wheel hub. It isn't removable. Both the bolt on type brakes and the Shimano Centerloc style brakes need a special hub that has the place to mount the rotor. You should ride over to one or two of your local bike shops and study the hubs on disc brake mountain bikes. Then you'll see that these are special hubs and not just road hubs with a part mounted to them.