what are you trying to do? sounds reverse of the how to use recessed brakes on a frame made for nutted brakes (which is drill out rear hole in fork, use the recessed rear break with an extra long recessed bolt and use the recessed front brake with a nut for the rear break.
nutted rear brake does not have a long enough bolt to use on the front
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Life is too short not to ride the best bike you have, as much as you can
(looking for Torpado Super light frame/fork or for Raleigh International frame fork 58cm)