Gromit
Guru
I've fitted a Terracycle Fastback Carbon Slim Seatback Bag to my Q559's seat. It is ideal for carrying a few tools, a map, a jacket and such stuff, for use on day rides. The bag has six straps with velcro hooks on one side and loops on the other. I found no need for the included spider pad.
To fit it, I took off the Q's seatback pad first. The bottom and middle pairs of straps go over the seat back and the velcro on them sticks to each other and to the seat pad and the seat pad's velcro strips. The top pair of straps pass over the seat back's top mounts.
The bag fits really well into the space between the seat tube and the seat back and it is really secure.
To fit it, I took off the Q's seatback pad first. The bottom and middle pairs of straps go over the seat back and the velcro on them sticks to each other and to the seat pad and the seat pad's velcro strips. The top pair of straps pass over the seat back's top mounts.
The bag fits really well into the space between the seat tube and the seat back and it is really secure.