Been running track wheels 700c on a Surly Karate Monkey 29er frame.
The rear wheel is 120mm, so running chaintugs inboard with an extra spacer to space the axle out to 135mm.
Think the rims are 18-19mm wide by 30mm deep semi aero track rims on track hubs.
Have run 2.3 Bronsons and Hans Dampf tyres with no problems, but wider would be better.
When i get round to it, then a proper 29er disc ready wheelset will be coming.
Cheap option was to use the rim brake 700c track set i already had and pick up a set of v-brakes, worked allright for a few years now, but i fancy gears on the Monkey