I was failing to love my summer commuter in a proper fashion and had not replaced the chain in too long. I got around to that and new brake pads and front tire on the weekend. I measured the old chain and thankfully I had done the work in time, such that the cogs probably haven't suffered much, if at all.
Nothing is quite like a smooth running fixed gear with a new, perfectly tensioned chain:
When I see other people on fixed gears, I sometimes notice some sagging in the chain; I feel sorry for those bikes. They need a little more love.
For the detail people: Those thingies at the back of the horizontal dropouts are chain tensioners or "tugs". They aren't really necessary, but the wheels I bought on ebay came with them and I like using them because they make it easier for me to dial in the chain tension just so. Front chainring is a Blackspire Mono Veloce 130/44. Rear cog has 17 teeth, works out to 69.3 gear inches and has served me very well around town.
R A N T W I C K