I replaced the worn out rear tire on my fixed gear, and while I was at it, replaced the chain too. I should have had the presence of mind at the bike shop to purchase a new cog too, 'cuz the new chain and old cog do not mesh well at all. So it will remain unridden until I replace the cog. Hopefully the chain ring is okay.

Rode my old steel Bianchi today, which is a lovely bicycle and doesn't get enough miles. Perfect riding weather this morning.