New answers tagged creak
Most probably, the seatpost just needs to be cleaned (dust gets in) AND/OR tightened a little bit. Don't overdo it, it's best to stay within the 50 Nm so as not to bust your seatpost ring or seat tube. Greasing the seatpost might also help. I wouldn't recommend any actual grease for this (messy, tends to get the seatpost stuck after a year of riding), ...
Often, dirt gets between the seat post and seat tube. Remove the seat post. Clean the post. Clean inside the seat tube. Grease the post and re-install. Hopefully the noise will be gone. You say the post is close to the max mark. For a little added safety, longer seat posts are available.
Try to put tube lower enough and check how it sounds in that position. If any sounds don't appear then just replace with new longer tube. It saves your frame. Or it might be sand or dirt cause noise. So try to clean up tube and frame.
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