Riding the road to PARADISE...RIP
Join Date: May 2008
Modern North Road bars are mountain diameter (the ones on many older bikes predate these standards). I believe most of them have a lengthened straight section, to accommodate modern mountain bike shifters, but I haven't tried this personally. The ones I have are about 21" at the widest point. They're from an old Raleigh 3-speed, but I assume the Walds are similar.
The cruiser bars should also be mountain diameter, but they will be much wider. I would guess that they would work with your shifters as well, but, again, I haven't tried this.
You might want to try asking in the utility forum. A lot of people there like North Roads (and similar), but I don't know how many of them look in here.