The 54km one sounds doable (adding a good 45km to get there)...
Know what the elevation profile for this is?
@Rowhan 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.
The 54km one sounds doable (adding a good 45km to get there)...
Know what the elevation profile for this is?