58 and 59 coming up way too soon.
In 2004 I was riding a lot of bike paths and wanted to get a better workout for the short time I had to ride after work.
So, with the help of Sheldon Brown (RIP) and wheel from Harris Cyclery I converted a 1967 Peugeot PX10.
After that I got a frame from Tony at IRO when he was in Brooklyn and made that a full time fixed.
My custom Tom Kellog/Spectrum geared bike still gets used when the ride will be hilly.
The photo is of ride that was 31F when we started. The coldest start for our winter rides has been 27F at 7:00 PM and it probably got colder. Since there are not gears to deal with, heavy mittens work very well.