On forward facing drop outs some people tighten up the locknuts and never have any issues, some people prefer to use chain tugs. I am personally in the latter clamp.
Both of the ones you posted on CRC are the wrong type for forward facing dropouts. What you want is something like the Surly Tuggnut - around £18-20.
You can get away with just the one, you are unlikely to need a pair. There's another thread on forward facing dropouts here; http://www.lfgss.com/thread2577.html
On forward facing drop outs some people tighten up the locknuts and never have any issues, some people prefer to use chain tugs. I am personally in the latter clamp.
Both of the ones you posted on CRC are the wrong type for forward facing dropouts. What you want is something like the Surly Tuggnut - around £18-20.
You can get away with just the one, you are unlikely to need a pair. There's another thread on forward facing dropouts here; http://www.lfgss.com/thread2577.html
Loads more info there too.