crunchy

Notice anything about this derailleur on my old Raleigh rain bike? Why might the chain be skipping..?



Hint: look at one of the pulleys, specifically the lower one. (A good diagram of derailleurs can be found here).

Can't find it? Neither could I. Lost it on a ride recently! Had to avoid inclines and muddy, soft surface areas so I could maintain peddling. Did that for 5 miles!