Edit: found an old thread with other whitewall ponderers:
http://www.r3owners.net/threads/old-school.13899/ - I think the mock-ups look awesome.
Yeah, that's (tire longevity) a concern. I don't generally beat the bike up and use all the torque all the time, and the R3T is really no heavier than any other fully kitted out bagger, so now I'm left wondering how likely it is that the 407D is structurally incapable of handling the R3T. Ie, I wonder if the old Excedras were just crap tires.
Is everyone rocking some Metzeler Marathons still or what are people using?