Why not just get a RD saddle pack bag? It takes like 15L? That's more than enough! Then top tube bag too if need be.
@skinny started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Why not just get a RD saddle pack bag? It takes like 15L? That's more than enough! Then top tube bag too if need be.