What could be causing the chainring bolts to loosen up every week or so? The bike is a fixed gear conversion and I'm using the bolts that came on the bike with an extra spacer on each bolt. 5 bolts and 10 spacers. There is a space on each side of the chainring.
They come noticable loose to the point where they almost fell off the day when I first noticed that it was happening, but now I just tighten them every week or so when I notice them getting looser, but I'm wondering what is causing it?
Is it loosening up because of the spacers?
Or are the bolts just old? Its an 80's steel frame bike and I'm guessing that its original from then.