I'm roughly 210lbs and 6 foot tall. I think I'll exercise a bit of patience and hold out for a 36 hole rear wheel. It's good to know that a 135mm rear hub will potentially work and that should streamline the sourcing part. I'm sure we could discuss which seals on Shimano hubs are better...road or mountain...but I suspect the mountain would win out.

As for upgrading the drivetrain on my old Kuwahara Caravan...Not just yet. I think the 12 to 28 cogset on the back should be good once mated to a 24 or 26 tooth granny up front and all the components on the bike are in good shape. I don't want to switch out the gearing for the sake of getting something new when the old equipment should do.

I'll see what I can find in a 36 hole rear wheel and hopefully use the Dura Ace hubs as trade.