Je pense pouvoir passer ce soir ou demain a Gland, je verrai s'ils ont la sacoche de selle et si je peux la voir / prendre des photos.
Sur le lien posté par léo, on voit que c'est les sangles qui tiennent le bouzin... maintenant la longueur...
Ici :
http://www.kriega.com/uscombo70-drybag/ y'a du texte qui dit comment ca se fixe :
Fitting
The UScombo70 tailpack is designed to fit all types of bike. The pack/s are easily attached/removed by 4 x alloy hooks. No extra bungees or rain covers are required. The US-20 can attach to either side or on top of the US-30. Extra secure subframe fitting allows tailpack combinations of up to 90-litres. Easy on/off with no loose straps left on the bike. Custom 6061-T6 alloy hooks attach to four discreet web loops located on the frame of the bike. Fitting method is particularly suitable for traditional one-piece seats and bolt-on seat-pads/racks. US-packs can be mounted inline or across the seat. Attach the 4 x alloy hooks to the loops and compress the pack down with the Q/R adjusters. Secure loose strap ends with the web tidy components and you're ready to go. Once connected the three packs can be removed from the bike as one luggage 'block'.
Apparemment y'a 4 crochets alu qui se prennent dans des boucles fixées sur la moto... Ceux-la :
http://www.kriega.com/us-hook-straps/Tu veux toujours que je passe ou les infos et images du site ca te suffit ?