Originally Posted by
leclaireave
.....would it screw it the geometry or something to just make a longer brake arm?
Ask kids who play on seesaws.
Canti and V-brake arms are simple levers. If you look at a V-brake arm the cable pulls from about 3 times farther from the fulcrum than where the shoe is. If you moved the shoe out another inch, doubling the distance to the fulcrum, you'd have to double the lengthen of the arm to maintain the same leverage.