Originally Posted by evilcryalotmore (Post 11784428)

I think surly cogs are loud because the way the edge is machined. its tapered a little higher then the avg.

Originally Posted by Scrodzilla (Post 11795000)

Weren't the older Surly cogs considered to be more problematic?

Originally Posted by TejanoTrackie (Post 11795107)

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.

Originally Posted by cc700 (Post 11780916)

you want the chain to move at LEAST a half inch total, back and forth when pressing and pulling on it in the center of the chain. when you're stopped, you want the pedals to move a small amount. the amount will change depending on your gear ratio and how much slack you actually have.

if you're running a 1/8 chain and cog and chainring you'll be just fine if you have as much as an inch or more of slack, even if the pedals move a ton while tensioning the top or the bottom part of the chain. if you have 3/32 components or you are using a ramped ring, you want hardly any slack at all. a track chain and track components won't derail even with tons of slack, say, two inches total. a ramped chainring and an 8 speed chain will derail at the slightest provocation with even a half inch of slack.

Originally Posted by diff (Post 11805770)

Cog, chainring, and chain came today. Just got done swapping it. 1st time doing this, hope I did it right haha. Greased up the threads, put the cog on fairly tight didn't crank as hard as I could, bottomed it and then gave it a bit more. Lockring though I exerted myself.