The old Colnago has just short of a half century on it.
The longest single day ride was about 180 miles. Photo was from last fall, day 2, after 130+ miles with a lot of climbing.
The "New" Colnago has also hit about 180 miles at least once.
In fact, both Colnagos managed to do the Blackberry Century last year, with the old one towing the new one for about 30 miles to and from, then being ridden by one of the other bikeforum members for the ride.
The Bike Friday did about 150 miles towing its trailer a year and a half ago. That may be the last super-century for it to tow.
The Tricross did make it for 100+ miles once. Up the Willamette (about 20 miles loose gravel), then over the mountains from Westfir to Cougar Reservoir, and back to Springfield (skipping a short gravel segment as it was getting late). I'm not a particularly big fan of fat tires, but it does well with the X'Plor USH tires.
Photo below was another trip for about 100 miles in a day and a half.
My litespeed has also done about 2 century rides shortly after being assembled. It is pretty much my dedicated rain/town bike now, so most days it gets < 50 miles now.
