If you have too much cable pull, that means the force must be less at the other end, i.e. less pressure on the brake pads for a given lever force. This is a bad thing, because it reduces the amount of retardation force you can generate from the brake.
http://en.wikipedia.org/wiki/Lever
If you have too much cable pull, that means the force must be less at the other end, i.e. less pressure on the brake pads for a given lever force. This is a bad thing, because it reduces the amount of retardation force you can generate from the brake.
There are specific flat bar levers with leverage ratios matched to road brake callipers, e.g. BL-R550
http://www.cyclesurgery.com/pws/UniqueProductKey.ice?ProductID=K310BXX