The Brother Allday Gear Pack provides the dropout hardware needed to add a rear derailleur to a compatible Allday singlespeed frame. A one-piece machined aluminium insert fits into the horizontal rear dropout and provides the derailleur mounting point.

The kit also includes cable guides that attach using the frame’s existing bolt positions. These give the gear cable a defined route along the frame towards the handlebars, helping a geared conversion remain tidy rather than relying solely on improvised cable attachment.

Brother notes that the insert may work with other frames using a similar horizontal dropout, but compatibility must be checked for the particular frame. This is a conversion-hardware pack: it is not a complete drivetrain and does not replace the need to select suitable gearing components.