Hello! I carry a heavy setup... Gary Fischer Kaitai 29", disc brakes, rack, Novara panniers and Topeak trunk. I carry my laptop every day, 35mm camera... all kinds of stuff. When I go grocery shopping, I hook up a Yak BOB trailer (15 lbs empty) and load it up to 60-70 lbs.
But them I'm not focused on speed but on functionality, and I feel by GF bike is sturdy enough to take a beating day in and day out.
GreenAnvil