Trek T-900 Tandem rear hub I have a Trek T-900 tandem that I bought used.  It's probably about 12 or 13 years old.

I'm having some rear hub issues with it, but I can't identify what hub it is.  Trek's website and other searches just say "Alloy Hub".  I don't even know for sure if the spacing is 145mm or not.

I'd like to identify the hub, because it needs a new cone.  If that's not possible, I'd like to verify the spacing (I don't have calipers) so I can have a new wheel built.
I've verified that the hub spacing is 145mm - standard for a tandem.  The hub on the bike is unmarked, unbranded, and Trek's website simply lists it as "alloy hub".  It appears to be a 135mm hub with a longer axle and spacers in place.