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Bianchi Denali seatpost issues

dosterman

Chimp
Aug 2, 2005
3
0
I have continuing seatpost issues on a 2004 Bianchi Denali steel frame. I am a relatively big guy 235. No matter what quick release I use or seatpost I have tried, the seatpost always sinks into the downtube over the course of the ride. Has anybody encountered the same problem or have a solution?
 

sanjuro

Tube Smuggler
Sep 13, 2004
17,373
0
SF
I had a similar problem with my Surly 1x1. After confirming the sizes of my seat tube and post with a set of calipers, I flex-honed my seat tube then just replaced my seat clamp. That seemed to do the trick.

Before that, I used a clamp for a seat post light. Believe it or not, it helped.