if you look up the Tubus rack's site ,they will give you max loads for there racks.on my last trip i think i had 14 lb in each rear pannier plus tent strapped to top of rack, plus a stool /i stuff sack with a few odd's and ends.it carried that load no problem solid as a rock.tubus logo rack/ortlieb bikepacker plus panniers/akto tent.hope that's some help.