Originally Posted by dbakl
You could try rotating the derailler on the seat tube; I try and set them up on a centerline of the chain running on the middle cog, then finetune from there. It's a little trial and error to find the best spot. Also, heightwise, the outer cage edge just needs to clear the teeth of the outer ring, 1/16-1/8 of an inch.
Sometimes it helps to bend that outer, front leading edge in a hair.
I'm this close to flattening it with a large hammer!
I can get it closer to the outer ting (lower) by a bit, it's a PITA trying to adjust when the spring is working against you. as far as the angle, my logic indicates that the outer edge of the cage should be exactly parallel to the crank arm to gain the most usable room.
BTW, I chacked the catalog 17 - circa 1974 - BEFORE the CSPC BS against catalog 18, 1985 - after said nonsense, and the BB axle length measurements from the catalog, as well as the P/Ns of the crank arms are the SAME?!? I can see them making a small adjustment to the crank arm - by the way - does anyone know exactly what they did?? but to have the EXACT same measurements in the details of the BB axle / spindle tells me that the axles were not changed ?!?!?!?