Bontrager backrack disc, size small, was on my girlfriend's arkose temporarily - £15
Tubus disco, was on my equilibrium for a month before I switched to a carradice sqr bag for commuting. Comes with standard qr skewer and spacers, and additional seat stay clamps as my bike had no bosses. Fyi this can also just bolt on to bosses if you have them - £50
@Colm
Have these that are surplus to requirements.
Bontrager backrack disc, size small, was on my girlfriend's arkose temporarily - £15
Tubus disco, was on my equilibrium for a month before I switched to a carradice sqr bag for commuting. Comes with standard qr skewer and spacers, and additional seat stay clamps as my bike had no bosses. Fyi this can also just bolt on to bosses if you have them - £50
https://photos.app.goo.gl/spfzn1F945zJzrLv2
Collection from se15.