the link was a safety improvement , on front brakes,
done for people who ignored their brake cables fraying..
cable from lever broke, then...
on the front , with mountain bike knobbies ..
transverse cable with the power of both return springs
came down between tire knobs stopping the tire .. face plant time..

Power = math - leverage.. cable pull shorter is more longer is less
MA, Mechanical Advantage..
https://en.wikipedia.org/wiki/Mechanical_advantage







....