This can't be right...
So I just got a new Soma track frame (rush). While pirating movies off the internet and waiting for them to download, I Screwed an old 113 JIS BB into my frame, and put the hub (suzue promax NJS) into the track ends. I then slipped the crank onto the taper to check the chainline, and the spider almost touches the chainstay, but the crank is still slightly too far out to make a straight chainline. What gives? If I tighten the crank onto the spindle, the spider will rub the chainstay, and if I use a smaller BB to get a straight chainline, the spider will rub the chainstay even worse. If I use a bigger BB, the chainline will be off even worse.
What gives? Shouldn't a track frame work with a track crank? I even emailed suginio, and they recommended a 113 bb with their crank.
Even if ISO tapers are bigger (aren't they smaller than JIS?), I still have the chainline problem! Any insight is more than welcome. Thanks!