rode (a large chunk of the way) to work on the Pug this morning...
Dropped the Landcruiser at the mechanics for a service and rode the remaining 45klm to work.
On the pug'.
With 3.7" tyres.
On the road.
Not as horrific as I expected it to be. Yes it did take a noticably more effort to get it rolling and up to speed. But once at speed... it stayed there without too much "extra" effort.
Pumped the tyres up to a "rock hard" 20psi too...