Bump. Chain falls off. Bump. Chain Falls off again. Bike upside down, wrench out, wheel pulled back. Chain tight.

Bump. Wheel slips forward again, chain loose, then off.

Bike upside down, wrench out, wheel back, chain tight.

Bump. chain off.

I missed not just my train but the next one too. Dirty as heck all day. I taught in my fila and merrell getup!

I'm tightening the heck out of the rear nuts, but no luck. Maybe I'm just too afraid of wrenching something super tight on the aluminum. I don't have a class last period, so I'll see if I can get it straightened out before heading home. Grr. What sucks is that I felt very fresh and rested and looked forward to a fast ride on a clear morning.