wheel
see also CAR, BICYCLE
- a circular object that moves round and makes it possible for a car, bicycle, etc to move; a similar object in a machine: wheel
- the outside edge of a wheel: rim
- the round, central part of a wheel: hub
- one of the thin pieces of metal that join the rim to the hub on some types of wheel: spoke
- a bar that joins a pair of wheels on a vehicle: axle
- a curved cover over a wheel on a bicycle, car, etc: mudguard
- when a wheel moves, it goes* round, turns, (more formal) revolves; to make a wheel go round: turn sth; nouns: turn, revolution
Slowly the wheels of the train began to turn. ◎ a single turn of the wheel ◎ 100 revolutions per minute
- to turn fast: spin*; to cause sth to spin fast: spin* sth
- to push or pull sth that has wheels: wheel sth
I wheeled my bike up the hill.
- a deep track that a wheel makes in soft ground: rut
※ tyres
- a thick rubber ring that fits around the outside of a wheel: tyre (AmE tire)
- the material used to make tyres: rubber (noun U)
- the raised pattern on the outside surface of a tyre: tread (noun C/U)
I think the tread on that tyre is getting a bit thin.
- the hollow rubber tube inside a tyre: inner tube
- a device that controls the flow of air in an inner tube or tyre: valve
※ repairing a tyre
- when a tyre has no air in it, it is flat
- a flat tyre: (especially AmE) flat
- a hole in a tyre or inner tube: puncture
I'm sorry we're late - we had a puncture on the M4. ◎ to mend a puncture
- when a tyre or inner tube breaks open suddenly and violently because it has too much air inside or because it gets a hole in it, it bursts*, punctures; adjective: burst
- to fill a tyre with air, you pump it up, blow* it up, (formal) inflate it
- a machine that you use to pump up a tyre: pump
a bicycle pump ◎ a foot pump (= a pump that you operate with your feet)
- a piece of rubber that you use to put over a puncture: patch
- to replace a wheel that has a puncture with a another wheel: change a wheel
- a tool that you use to lift a car, etc so that you can change a wheel: jack
- to lift a car, etc with a jack: jack sth up
- an extra wheel that you keep in your car so that you can replace a wheel that has a puncture: spare (wheel)
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