So the other night I was riding with my best friend when my seat decided to go nose up without warning. Needless to say I said, "woo woo WTF?!" I got off and tightened the 1 bolt. Got back on and the seat still wobbles something terrible. I pulled the seat off the post today and as you can see in the picture it's pretty much shot.
Does anyone have any suggestions on a good post that holds up under big weight? (385 lbs)