I had to drive in to work today for the 3rd time this year. It was not a result of time, energy, scheduling, weather, or anything like that. It’s because I installed the new 9-speed Ultegra cassette (rear gear pack, this one ranges from 12-27 teeth as opposed to 13-21 of the old one) on my bike last night, and the chain is incompatible. Dismayed, I updated the spreadsheet that I track my bike to work schedule, and this single day took me from 93% biking down to 89%. I never realized how good it feels to start the day off with some exercise until I was forced to miss it. I need to get this taken care of post-haste. The search for a chain begins…