Coldest commute of the fall so far with temps in the upper 20s. Should have worn my warmer gloves as my hands were cold, but otherwise I was dressed just right. Rode my Italian racing bike (De Bernardi) because I felt like going faster today and I made good time despite the cold dense air. However, I forgot the key to my office and had to turn around 1/2 mile from home to go get it, adding back the 5 minutes I gained by riding the faster bike. Didn't matter because I left 15 minutes earlier than usual today.