Fixed Gear Frames

Build your own fixed gear or single speed bike around an Unknown frame. The Paradigm frame is made from heat-treated 6066-T6 aluminium and takes a 27.2 mm seatpost, a 45 × 45 integrated headset and a 68 mm BSA bottom bracket. It is sold as a frame only, in Black or Red, in sizes 52, 55 and 58.

The Singularity frameset uses a 6066-T6 aluminium frame with an aero seat tube for the model-specific Unknown aero seatposts. Check each product page for what is included, sizes and current availability.

Complete your build with a carbon fork, or explore our complete fixed gear bikes.