Originally Posted by tylersage
i just bought an iro mark v pro i got it on thursday, it was working perfectly for three days includning a ride. today i get on to go meet for another ride and when i pedal really hard something gives and the pedals slip the sane thing happens when i skid. im thinking its either the lock ring and cog or crank but i dotn know enough about either to know how to fix it. any suggestions?
What kind of cog is it?
Some of the Surly cogs (I think they've since fixed the problem, so probably just the older ones.) were a little too narrow and would leave a thread or two worth of space between the cog and the lockring. I had the same problem. I installed a small spacer (a bottom bracket spacer will fit) between the cog and lockring and haven't had the problem since.
-Trevor