The main triangle of a bicycle frame is made up of a
top tube, seat tube, and down tube. Together, these
three tubes are responsible for determining the
strength and stiffness of a bicycle.
The geometry ( kikagaku in Japanese ) of these three
tubes, which should match the needs and dimensions
of each rider, can significantly affect one’s time
on the bike.

  • Shock Resistant
  • LED light
  • Selectable illumination duration (1.5 seconds or 3 seconds), afterglow
  • World time
  • 31 time zones (48 cities + coordinated universal time)
  • daylight saving on/off, Home city/World time city swapping
  • $190