You can use the calipers that you have bought by following Sheldon's instructions (EPR posted link above). Simply mount the front caliper on the back & the rear on the front. Sheldon outlines the two methods of mounting the rear caliper onto the forks.
I used this one, and it works very well ...
Just can drill/dremel/file out the hole at the back of the fork crown to fit a long cylindrical recessed nut, which should then reach the short centrebolt of the rear caliper.
Obviously, remember to swap round the brake pads, so that they are facing the correct direction.
You can use the calipers that you have bought by following Sheldon's instructions (EPR posted link above). Simply mount the front caliper on the back & the rear on the front. Sheldon outlines the two methods of mounting the rear caliper onto the forks.
I used this one, and it works very well ...
Just can drill/dremel/file out the hole at the back of the fork crown to fit a long cylindrical recessed nut, which should then reach the short centrebolt of the rear caliper.
Obviously, remember to swap round the brake pads, so that they are facing the correct direction.