Would it not depend upon what kind of terrain? Here we have plenty of mountains.. As one interested in touring, of which bike friends are about to cross the US, I would hope for many 100 mile day..By that I mean the easy days in flat states-through the plains. Hope 100 mile days in such terrain is not a knock out..Because in long distance touring, I count on doing many and often. Flat terrain, 100 miles- I hope that is considered easy.?
Not sure about Brisbane..
Last year I did a 104 miles in 6 1/2 hours, but with about 4.000 feet of climbing.