Old 10-17-05, 05:29 AM
  #4  
sestivers
Ono!
 
sestivers's Avatar
 
Join Date: Apr 2005
Location: Seattle
Posts: 643

Bikes: 2006 Cannondale R800

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
They're called "stops." You'll see why as I try to explain...

View the bike from the rear. One of the screws will stop the derailleur from moving too far to the right and prevent the chain from being pushed off the smallest rear cog, even if the shifting cable is completely loose. The other screw will stop the derailleur from moving too far to the left and prevent the chain from being pushed off the largest rear cog and into the spokes, even if the shifting cable is pulled too far/tight.

If you look closely at the mechanism, you can see the little tabs that will rest on the tips of the screws when you shift to either the largest or smallest rear gear. It will be easier to see if you screw the screws all the way in... you will have to unscrew them partially later to get it to work correctly. From there I think you can figure it out.
sestivers is offline