I have the V1 saddlepack. It's really nice (webpage says 10-11l: http://eng.uraltour.com/saddle-packs/) and I used it from London to Paris with minimal issues other than occasional drooping due to not securing it tightly. That + holding 13l at the front is an option I guess.
EDIT: I've just read your past posts regarding seatpacks fitting a bike with minimal seatpost showing: when I ordered the Uraltour for my previous bike I had 10cm of post showing and about 20cm between the rails and the tyre, and they said this was fine (you only been 16cm apparently). Postage was quick, and the quality it pretty good, though I've not seen any alternatives in the flesh tbh.
I've just ordered a Uraltour V1 myself, I'll let you know how it is. Luckily I've got a fair bit more seatpost on show, I think about 40cm from saddle to tyre too.
The Uraltour V2 is better for those with less of a gap between saddle and tyre, I think?
I have the V1 saddlepack. It's really nice (webpage says 10-11l: http://eng.uraltour.com/saddle-packs/) and I used it from London to Paris with minimal issues other than occasional drooping due to not securing it tightly. That + holding 13l at the front is an option I guess.
EDIT: I've just read your past posts regarding seatpacks fitting a bike with minimal seatpost showing: when I ordered the Uraltour for my previous bike I had 10cm of post showing and about 20cm between the rails and the tyre, and they said this was fine (you only been 16cm apparently). Postage was quick, and the quality it pretty good, though I've not seen any alternatives in the flesh tbh.