Originally Posted by
TejanoTrackie
Yes. They were machined incorrectly, such that the tooth pitch (spacing) was off. I replaced mine with a Dura Ace, which completely solved the problem. Although the newer Surly cogs may be ok, I can't see paying more for them when the less expensive Dura Ace cogs are just as good if not better. For cogs larger than 16T, Soma is golden.
Yes, they are fine. I have a 15T thats a year old. Normally I wouldn't pay the extra for a Surly, but I found it on sale somewhere, and its just as good as any (DA, Soma, EAI, etc.) cog I have ever used.