To prevent stealing of the seat, I replaced my "fast lock" seat clamp with a model using a regular screw:
The problem is that the screw keeps unscrewing, and I'm already tightening quite strong. I could screw even further but I'm afraid to break something. The screw is steel M5x12, the collar is aluminium, diameter 31.8mm. The bike frame and the seat stem are aluminium.
I thought of the following solutions:
- Apply some thread lock
- Use a larger, 2-screw clamp, like the followings models:
Which solution would you recommend?
Update - adding a picture of my seat clamp: