My Crusoe is my all-around workhorse. Here's a rather large box I strapped to the rack and hauled a mile down the road to the UPS store. This is the largest circumference load I have carried on the Crusoe. Though the box wasn't strapped down extremely well, it was better than it looks with my bike leaning against the steps, and we arrived no problem and indeed I brought the bike and box straight into the store.
On a side note, after dropping off that box, I rode to Best Buy and brought the bike into the store, where I then bought a printer which I strapped to the bike and brought home. I love SWB's!