Originally Posted by
maddog34
Avid MTB/long pull measure @ 32mm from pivot center to clamp surface.
Tektro and Promax(plus a gaggle of knockoff variants!) seem to imitate the Avids...
Yep -- I have a pair of Avid FR-5s and a couple of pairs of Tektros that I don't have a model number for, and they're all about 32mm. Interestingly, every Shimano long pull lever I have measures at about 40mm...and they don't pull a mechanical disc brake caliper very well (though you can set them up with a ton of rotor clearance!). Every flat bar short pull lever I have is in the 27-28mm range. The difference between those and the Avid/Tektro long pulls is about 15% (which demonstrates just how far Shimano's 40mm radius is from other brands' long pull levers - about 25%).