B-b-b-b-b-b-bicicle Rider
Join Date: Apr 2005
Location: Racine WI
Posts: 749
Bikes: 1997, stumpjumper S-works hardtail, Medici, Giant Perigee(track dropouts and fixed gear), Columbia twosome, schwinn twinn, '67 raleigh 5 speed internal hub, Old triumph 3 speed, old BSA 3-speed, schwinn Racer 2spd kickback, Broken raysport criteriu
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what type of chain are you using. If you have chain made for multiple gears it may be too thin for the surly cog. I may not be seating well onto the teeth of the cog, as single speed cogs are fatter than the cassette cogs. Try a single speed chain (if you haven't already).