Givi PL5103CAM Saddlebag Holder For Trekker Outback Cases - BMW F650/700/800GS Twins Volume: 37 Liter, 48 Liter, 42 Liter, &amp; 58 Liter Weight of cases lbs: 12.65, 13.5, 13.29 &amp; 15.6 Color: Brushed Aluminum / Matte Black Construction: Aluminum Max Load lbs: 22, 22, 22, &amp; 22