So, I got a new tark cog today and had my LBS put it on for me (i don't have a chain whip or lock ring tool). They told me that I should come in in a few days and have them give the lock ring another crank. This is a reputable shop and the tech is experienced with fixed gear bikes. Is a cog/lock ring always expected to have a settling period or are we doing something wrong?
Whenever I've put on a cog myself or had the LBS put it on I eventually get some slippage in a week or two. In another thread this was treated like a result of poor setup. Is it really, or do the rest of you get this break in period?