I've been riding this bike in a few iterations, and this is the next chapter!
We are on our 3rd set of wheels for this bike, it is now running 29ers! The front is a wheel from Ebay, delivered for $50. The rear is a Sturmey Archer X-RD8(W) 8 speed hub, with 25 tooth cog and disk brakes. That Trek frame is more than big enough for the 700c rim and moderate tires.
My brother Martin is visiting from Flagstaff next week, so he will be using this bike for the week!