If a single bolted caliper brake on a skinny brake bridge can stop a cyclist roaring down an alpine pass in the TDF why is it a concern to have a v-brake mounted with one bolt and two jubilee clips. Any incident that would break that would also bust a normal frame mounted brake. Plus the brake plate comes from the world of BMX, not famed for their finesse and delicate touches.
1) v-brakes are more powerful than calipers, if they wern't then we'd all be using them.
2) The frame still isn't designed for a caliper brake, so it won't fit as intended without modification.
3) using jubilee clips to attach brakes to a bike frame is crazy.
4) BMXer's (from what I've seen) only ride for a few minutes, whereas mountain bikes before to ride for more like hours between stopping and checking if jubilee clips have moved or something!
5) Tearing down a hill at 30mph and having a brake failure / brake jam in spokes is going to be worse than overshooting at the finish of a BMX race!
5) The frame isn't designed for v-brakes (or calipers) so you would be applying forces in an area not designed for them.
intrincycle at gmail dot com
In the real world it probably won't work, in the theoretical world it is not impossible.