I have single speed bicycle with a straight dropout.
The problem I'm having is that over the course of a week, the chain loses tension until eventually, if I do not re-position the back wheel again, leads to the chain coming loose.
This is a minor annoyance while the bike is configured on its freewheel, however, it could be positively dangerous if I used the fixed gear.
What am I doing incorrectly?
Are there any spacers I can fit in to the drop-out to alleviate this problem?
Or perhaps it's the fact I'm using a multi-tool to tighten the bolts. Maybe I need a tool that gives me more torque?
Your advice is much appreciated.