Originally Posted by
One Way Rider
Running around with the B tension screw in will make the shifting, especially in the smaller cogs very sloppy and imprecise because now the chain gap (distance from bottom of cog to top of pulley) is too big.
The pulley is very close to the smaller cogs in those gears - I actually question if that is too close too.
I took a look at the pics on parktool's website:
http://www.parktool.com/repair/readhowto.asp?id=26
Scroll down to the pic that has the caption below: "Adequate chain length seen above in largest sprockets front and back. Note the chain bends at both pulleys." My derailleur looks similar to this in BIG-BIG, but the chain between the pullies is almost vertical. So my chain is a little longer than their pic configuration. But is that enough to be problem?