It was treacherous riding in today. It rained all day yesterday and was 2C when I got up this morning, so with the roads wet and above freezing, I didn't take the studded tire commuter. However, about 5km into a 35km trip, I noticed the temperature had dropped quite a bit. We live on a mountain side, so usually it's colder at home than at work (which is 300m lower in elevation). However, this morning, there was a temperature inversion, so I ended up riding on black ice for about 30km. Not what I had in mind. Fortunately, I didn't fall, but had a few moments where the tires slipped. I cursed myself for not taking the studded tires, but I also knew it would be a sunny and warm afternoon and I hate riding on studs when the roads are clear and the temps are well above freezing. The ride home this afternoon was great and I was glad to have my normal tires! Clear skies, clean roads, and 5C. Got to take advantage of nice winter afternoons like this.