Originally Posted by Econoline
No, the spacing of the hub to dropout is fine. The problem is that the track cog and SS freewheel are not symmetrical on the flip-flop hub with respect to centerline of the hub. The track cog sits 3mm more inward. I can space it out with BB spacers to make things symmetrical.
It is not a Surly Cog Design Flaw. It is a Design Feature. It's adjustable. . .
However Surly should include 1mm and 3mm spacers and documention with the Cog. As I changed the cog on my Pista when it was newly purchased, so the LBS supplied the spacer. Otherwise I would been on the hunt for Cog Spacers. It's foolish of Surly to assume that we all have supply of small parts. Also Surly could have mentioned Cog spacing and placement within "documentation" of which there is none. . .