I did my first commute of the year today. It was 32 in the morning and I was a little cold, but about 45 on the way home and I was roasting. This was my first ride on my "upgraded" Trek 7000 mtb/commuter. I put fenders on it a few weeks ago, but it was sunny out today so I didn't get to test them out. I only put them on because I had them sitting in my basement for 20 years, plus it was probably 5 or 6 years before that when I last used them when I was young, single, and living in an apartment in Seattle. They are mostly so I can ride in and not have to worry about rain on the way home. I won't ride in if it's raining.