I just got a new bike that came with 170mm Truvativ Descendant DH cranks (GXP 83mm). My preferred crank length is 165mm. If anyone would like to trade crank arms please let me know. I'm looking for a direct trade... your decent condition 165mm crank arms for my new 170mm ones. Alternatively, if you're just straight up selling some for a reasonable price please shoot me a message.