Originally Posted by Mistawes
Are you using your old rear cog? Might just be from the different wear they've experienced, could settle in with a little wear, (everything should be changed together - ideally).
Actually, no. If you maintain your chain and change it before it shows excessive wear, your cog should last quite awhile. And a chain ring should last almost indefinitely.
Try a bit more slack in your chain.
This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.