Originally Posted by foresthill

I don't think that's quite right. My understanding of the 1:1 ratio is that 1mm of cable pull results in 1mm of lateral RD movement. Lever throw is going to measured in degrees or radians, so the actual linear distance you move it depends on where on the lever you're pushing. Regardless, I think have to move the lever more than 3mm to even get past the "release" motion.

This is described under "exact actuation" here: http://www.sram.com/technology/187/t...m-road/src/cat