Ortlieb Rack Top Trunk Bag RC 12L Roll Closure BlackOrtlieb Rack Top Trunk Bag RC 12L Roll Closure Black. The waterproof Ortlieb Trunk Bag RC (Roll Closure) features the Ortlieb Rack Lock system it fits almost any standard rack. With 12 liters volume and a shoulder strap it is the right bag for longer touring or shopping. An additional outer pocket (not waterproof) and an inner pocket with snap hook help organizing small items like cell phone wallet and keys. Maximum capacity is 10 kg 22lbs Sturdy