Originally Posted by
dabac
Same difference, all the brake levers can do is to trade force for travel - or the other way around. Adjustable for force is just another way of saying adjustable for travel.
Basic numbers:
The average distance between brake lever pivot point and brake cable anchor is 28 mm for a canti/caliper compatible brake lever and 35 mm for a v-brake lever.
I can't really vouch for the servo-wave as I haven't one available, but the Avid Speed Dial is definitely adjustable between 28-35 mm, which would make it equally compatible with both v-brakes and canti brakes.
The Speed Dial doesn't change the location of the cable anchor point. It only changes the location of the pivot point. Below is a cut away of one of the levers
When I've played with the Speed Dial on these brake levers, the cable anchor point has not moved. I haven't had to adjust the brake pad adjustment which I would expect if the anchor point was moved 7mm (0.25") That's a lot of cable adjustment and would be very noticeable.
You might be able to change the anchor point with the lever
reach adjustment but even there 7mm is a whole lot of adjustment...much more then normal. I've adjusted both the pivot and the reach for my wife's tiny hands but neither changes the anchor point that much.