I've retired my BOB trailer but when I used it I would carry about the same weight that I would carry in two rear panniers + whatever was placed on top of the rack...20-25 pounds. I'd also use small front panniers for quick grab day time items. I may have exceeded this limit during a trip on the Great Divide. When I used to lead ACA TransAm tours using the BOB I would often be recruited to help haul groceries for 13 a short distance from store back to camp. When loaded beyond 50 pounds it would be quite flexy and unstable!

TransAm alternate route over Gibbon's Pass MT...