  In this work we perform the first ever demonstration of gear-changing in a
real world collider. Gear-changing refers to a collision scheme where each ring
of a collider stores a different harmonic number of bunches. These bunches are
kept synchronized using different velocities. Such a system has been theorized,
but has now been demonstrated using the Double ElectroStatic Ion Ring
ExpEriment (DESIREE) in Stockholm Sweden. The experiment was able to
demonstrate a gear-changing system, with both four on three bunches and five on
four bunches. We determined a measurable parameter that shows a gear-changing
system out to $37500$ turns of the slow beam. We also developed new insights
into how to control this type of system, opening up new possibilities for
research.
