A nucle-cycle was a motorcycle-like ground vehicle used on the planet Nukolee.
History and specifics[]
In the year 2267, royal guards driving nucle-cycles escorted Prince Raviki to his palace. One of the guards deliberately steered his nucle-cycle into a lake of lava. It was later determined that he had been affected by gases from Sanduy's Comet, which triggered random bouts of temporary madness. (TOS comic: "A World Gone Mad")