Originally Posted by
rccardr
You might also want to pay attention to your shift speed/force.
+1 usually drops like this are more user error than anything else. Most riders down shift because they are going to climb a hill. Make sure you give the drive train time to engage before you start pushing up the hill. If there is too much pressure on the pedals when you downshift, there is the probability that as the chain releases from the big chainring, you may spin the crank a link or two before the chain engages the small chainring, which can cause a dropped chain. When you downshift, take a little pressure off the pedals until you feel the chain has fully engaged the chainring and then travel on..