I have a set that came of a Norco Threshold A2 2014 model (Alex WTB19 I think) can go down to 25c. I did about 1000 miles on then and then I have had the bearings serviced and never used them since as I bought a pair from Planet x in the Fibbbocini sale. It is a 6 screw bolt on hub.
I also have two michelin city 700x28 tyres and one Continental sport contact 700x25 that I can chuck in. Both seen about 100 miles before I swapped them out for something more resilient to pot holes.