Here's the track bike with 38mm 650b Pari-Motos
37mm actual in the back, 39mm actual in the front. 48/17 and this chain length ends up being a bit of a magic ratio because the rear wheel can't come any farther forward without the tire fouling the chainstays. Should end up as a 72" gear or so.
And yeah like
Senrab62 said, it's cold as hell here so I won't be riding it for a little bit
