OK. Now I have logged in quite a few miles so wanted to give some feedback on the Stromer Big Bens. This is all based on "seat in the pants" nothing scientific.
The width of the tires is "2.2 inches". Very slight degradation in turning and hill climbing but definitely feel faster otherwise. Ride quality is similar.
For all but more than gradual inclines I can maintain 20.7 miles per hour while topping out at 23mph and some change on flat stretches.
So far I have not experienced flats with either tire. The stock tubes look cheap unfortunately but have held up.
I am definitely happy with the BB's.