Where we're going, we don't need roads.
This is a sci-fi trope in which a wheeled vehicle of some kind is capable of flying or hovering by simply rotating the wheels 90 degrees, usually up and into the vehicle in question. The hubcaps then become thrust-capable engines, propelling the vehicle upwards.
- Although it doesn't use this for flying, Ian Fleming's Chitty Chitty Bang Bang may be the Trope Codifier. To wit: the Pott family is picnicking on a beach, and the tide comes in. Mr. Pott turns a knob, causing Chitty's wheels to turn down and out in this manner. The car glides along the water exactly like a hovercraft.
- In Agents of S.H.I.E.L.D. it seems that Howard Stark managed to produce at least one fully functional version of the prototype seen in Captain America. Agent Coulson calls it Lola.
- The Foot Cruiser◊ from the original Ninja Turtles toy line had wheels that folded under to give off this look, since the car is from Dimension X in the backstory. The toy itself couldn't fly, obviously.
- Some of the M.A.S.K. cars were this.
- S.O.P.H.I.A. the 3rd and all of her variants from the Blaster Master series.
- Many of the ground-based Transformers from Transformers: War for Cybertron and Transformers: Fall of Cybertron use hubcap hover wheels when moving around at normal speed (to enable strafing), but flip down into standard wheel mode when boosting.
- One of the upgrades in Streets of SimCity.
- The versatile hoverpod powerup in Vigilante 8 Second Offense that levitates sportscars, motorbikes, RVs and garbage trucks alike.
- Danica Patrick's F1 car in Sonic & All-stars Racing Transformed will rotate its rear wheels 90 degrees backwards, and either spin up to turn into jet turbines for flight mode, or extrude propellers from the center of the rims for water mode.
- The karts in Mario Kart 8 do this for the anti-gravity sections of tracks.
- Before Mario Kart 8 did something very, very similar, Crash Nitro Kart featured zero gravity sections using the exact same thing.
- Featured in Lego: Drome Racers as a power-up for the street and off-road vehicles. When activated, the car would begin hovering above the track at top speed. The drawback of this however was that the car wasn't very stable in this state and hitting walls, smacking into obstacles and trying to fly over the tops of opponents would result in the car flipping onto it's side, smacking into walls, spinning out or randomly crawling along the invisible walls around the track.
- A derivative appears in Elite: Dangerous's first Expansion Pack, Horizons. The Surface Recon Vehicle is a six-wheeled rover for exploring planets and planetoids, and has a gimballed thruster in each wheel hub. On a low-gravity world, they fire upwards to keep the rover on the ground, whereas on high-grav worlds they fire downwards to prevent the suspension from bottoming out. The thrusters can temporarily be fired for a forward boost or a jump.
- Overwatch has these as part of the world-building: All the "payloads" on Escort maps have wheels tilted 45 degrees relative to vertical and have glowing blue (or red, depending on whether attack or defense is in control) rims.
Hal-Fred Glitchbot: (if the payload stops on Hollywood)
Might as well have tires
on this thing!