Facebook Twitter LinkedIn Pinterest Bluesky Threads The cog moves other then that it works pretty good not sure if I need to replace a part or smth. I have tried to tighten the lock nut even more but it doesn’t work. Cortex Fc problem? byu/badsam112 inbmx by badsam112 Bicycle Bicycle Motocross Bicycling Bike Biking BMX Cycling