freewheeling hub


freewheeling hub
/friwilɪŋ ˈhʌb/ (say freeweeling 'hub)

noun
a hub system used in many four-wheel drive vehicles which allows the wheels to freewheel and not turn the drive mechanism under normal road conditions, thus reducing frictional loss.
Also, freewheel hub.

Australian English dictionary. 2014.

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