After experiencing a puncture, you fit a temporary space-saver spare wheel to your car. Wh… — UK Driving Theory Test

After experiencing a puncture, you fit a temporary space-saver spare wheel to your car. Which restriction must you follow while driving with this wheel fitted?

A
Reduce the tyre pressure below standard recommendations to compensate for the smaller contact patch.
Drive at a maximum speed of $50\text{ mph}$ ( $80\text{ km/h}$ ) and replace it with a standard tyre as soon as possible.Answer
C
Maintain normal driving speeds up to $70\text{ mph}$ ( $112\text{ km/h}$ ) as long as the tread depth exceeds $1.6\text{ mm}$ .
D
Drive at a maximum speed of $30\text{ mph}$ ( $48\text{ km/h}$ ) and avoid using dual carriageways or motorways.

Answer

You must not exceed a speed of

50\text{ mph}

(

80\text{ km/h}

) and should have the tyre replaced with a standard road tyre as soon as possible.

Space-saver spare tyres are smaller and narrower than standard vehicle tyres. They are intended solely for emergency use to allow you to reach a tyre specialist or garage. Operating them above

50\text{ mph}

(

80\text{ km/h}

) or over extended distances compromises braking stability and cornering grip.

Step-by-Step Solution

Identify the type of replacement wheel fitted to the vehicle.

The vehicle is fitted with a temporary space-saver spare wheel.

Space-saver wheels have distinct mechanical characteristics, smaller dimensions, and narrower tread compared to standard road wheels.

Apply manufacturer safety specifications and UK regulatory guidance for space-saver wheels.

The maximum permissible speed is

50\text{ mph}

(

80\text{ km/h}

), and usage is strictly temporary.

The altered dimensions adversely affect vehicle stability, handling, and braking performance under extreme conditions.

Key Concept

Operating limits and safety restrictions for temporary space-saver spare wheels

Estimated Time:1m 0s

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

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