Ortlieb Vario QL2.1 backpack/pannier 26 L petrol

Backpack with roll closure and Quick-Lock suspension system; can be used as a bike bag or backpack; quick, intuitive switching between functions using the reversible front pocket; outer pocket integrated into flap (not waterproof!); outer mesh pocket on the side; inner pocket with laptop compartment; carrying handle; chest strap; reflectors.

QL2.1: Quick-Lock2.1 system up to 16 mm rack tube;
Accessories available separately: Anti-Theft-Device (E124); QL2.1 hook 18 mm (E211) & 20 mm (E193).

QL3.1: Quick-Lock3.1 system up to 10 mm tube diameter as standard; essential mounting elements are permanently attached to the left or right of the pannier rack; rear of the bag remains free of interfering hooks.
Accessories available separately: QL3.1 clamps for 11-14 mm tube diameter (E190)

Adapter: QL21