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BDifficulty 2/5

Before jacking up a vehicle to change a punctured wheel in a safe place, what helps prevent a wheel still on the ground from rolling?

Correct answer

A suitable chock to block the wheel.

A suitable wheel chock, positioned according to the manufacturer’s instructions. It prevents vehicle movement; it does not balance tyres or repair a puncture. Before lifting, secure the vehicle with the parking brake and the transmission position specified by the manual on firm, level ground. The manufacturer specifies which wheels to chock and the jacking points. Do not go beneath a vehicle supported only by a jack; obtain assistance if changing the wheel is unsafe.

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  • A suitable chock to block the wheel.

  • A wheel-balancing weight, which by itself stops the vehicle rolling.

  • The tyre bead, with no brake or immobilisation device.

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