So i was out on my usual 15mi mashfest with my still new Steamroller, coming across a bridge, hauling typical ass, musta hit a bump or something because to my surprise my chain derailed. Luckily I wasn't bucked or anything (how common is that?) Anyway I guess my tension was a little too loose, I hadn't checked it in a few days. Is it normal for them to loosen over time or do I just have to crank down my nuts harder? I had my wrench with me but decided to just ride the few miles home gently as it was. I decided to take a pic of the tension:
It's a little loose but I wouldn't have thought it would derail. So anyway, fyi. I've seen some pretty loose recommendations for chain tension around here, but I'm gonna start erring on the tight side. Basically like Sheldon Brown said:
"make the chain as nearly tight as possible without binding. Notice how freely the drive train turns when the chain is too loose. That is how freely it should turn when you are done, but with as little chain droop as possible."