I managed to bend the teeth on my third cog today.. If you look a it closely, you can see that the teeth on the third cog is closer to 4th cog than on the 2nd..

It causes my chain jump everytime..

What might have caused this? bad shifting? or just leg power ?

is this repairable or is it time to buy new cogs??

BTW the cogs are less than 2 months old..

pic is below,

thanks!