ORTLIEB Seat-Pack QR 7.5 L

The Ortlieb Seat-Pack QR 7.5 L is a saddle bag built for cyclists who want reliable storage without the fuss. Made from abrasion-resistant PU-coated nylon (PS21R / PS33) at Ortlieb's factory in Heilsbronn, Germany, it weighs just 490 g and packs 7.5 litres of volume that can be reduced further using the compression valve and five internal compression straps. The patented Seat-Lock QR (Quick Release) system clips directly onto steel or titanium saddle rails—no tools, no sticky residue. An included adapter (4.3 cm wide) extends compatibility to dropper seatposts, provided they are steel or titanium with roughly 3 cm of post exposed. Carbon rails, carbon posts and electronically actuated droppers are not compatible. Rolling the top closure 3 to 4 times achieves IP64 protection, meaning the bag handles dust and water jets from any angle without letting moisture in. A rigid base plate sits beneath the bag, protecting the contents from knocks and acting as an integrated rear mudguard. An external bungee cord lets you strap on a jacket or extra gear, while a built-in reflector and a daisy chain attachment point keep a rear light firmly in place. Measuring 16 × 42 × 22 cm and rated up to 5 kg load (hooks in rear position), the Seat-Pack QR is backed by a 5-year manufacturer's warranty against defects in materials and workmanship.