Made the conversion of my Fixed gear today… for the most part. I finally got ahold of some presta tubes that fit the tyres I got. I got Schraeder originally because no 38 mm tubes were in stock… but of course they don’t fit through the rim. I’ve got things in line now and the fatties are ready to ride! I also flipped the stem upside down, it’s a steep one and with the fork having a much more considerable rake than my tri bike I didn’t really realize how much higher I could put the bars. They’re good though, really upright for riding.
I unfortunately had to swap the gear back for the 17 tooth. My chain is just a couple links short of what I need to fit it on the 20 tooth cog. That’s OK for now I suppose but I’ll need to get some chain links to fix that problem before it gets really icy.