RattleCAD is a free download - not as detailed as BikeCAD Pro but could be useful for visualisations. You may have to download a couple of other apps to get it to work.
@General_Strike 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.
RattleCAD is a free download - not as detailed as BikeCAD Pro but could be useful for visualisations. You may have to download a couple of other apps to get it to work.