Lockrings

Charlie Says...

"Hey there... for correct fixed use, the fixed cog should NEVER move on the hub when pedal force is applied in both directions.
So if the cog moves, then something is wrong.
Continued use with a fixed cog that moves kill your hub, and then you are looking at a new wheel, and maybe some new teeth for your face. Get Lockring tool from our tools page and look after your bike, and yourself, eh!"