125mm rear spacing. I can't find a 125mm rear hub in Harris Cyclery's singlespeed hub list.

Is that going to be a problem? I know nothing about wheels...

Glad you saw the missing lockring! I guess that pic was in the original ad. bummer he sold the wheels already.

Oooh, will I get to buy a Surly Jethro Tool? I like Trek's... BTW Trek, be sure you tighten the nuts on the front wheel (and check the back wheel) again before you ride. They really did loosen up on me.