Ruthia
Ruthia is the muddy planet where mono racing began. Long defined by its wet, treacherous surface, it was once patrolled by law-enforcement monowheels — and today remains the spiritual home of the sport.
A civil war on Ruthia toppled the old law enforcement order, leaving fleets of monowheels for scrap. Locals adapted them for daily commutes across the mud, and eventually for racing — birthing what would become a galaxy-wide sport.