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Current selection BTW:Yep. The fundamental problem, if the brake is to be mounted to the fork crown, is that a sidepull must have arm lengths at least vaguely proportional to tire size. That reduces the mechanical advantage of the caliper, requiring more hand force for a given deceleration. That's the fact that originally caused me to choose cantilevers.
https://www.yellowjersey.org/SINGLEPV.JPG
plus these:
https://www.yellowjersey.org/spmxgrey.jpg
Nothing wrong with V brakes or cantilevers, but people do have their preferences and there are tradeoffs so the selection is and has been quite broad.
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