I know this is an ancient thread. I am told....RD C101 are different from the majority of derailleurs because when in "zero cable tension" the RD stops inboard on the largest sprocket. Most when under zero cable tension will rest out in the smallest sprocket....assuming stops etc are correct. There is a name for this type of RD? For the life of me I cannot remember.

Why my question? I was going to replace the front grip shifter and figure that although all RD are "dumb" and only do what the shifter tells them to do, this inboard stop might require a different type of shifter.

Bike is a nice all steel Multitrack Trek we bought years ago new and she needs some love.

If this is a basic question my apologies. My wrench work is a bit dated and I am just getting back into my stable of bikes.