What are under inflated tyres likely to cause?
- A Decreased fuel consumption
- B Increased rolling resistance
- C Decreased stopping distance
- D Increased tyre lifespan
Why this is the answer
It's important to check your tyre pressures regularly for safety reasons and to save you money. Under inflated tyres can cause an increase in rolling resistance, which increases fuel consumption. Under inflated tyres also cause longer stopping distances and wear more quickly. Always check the tyre pressures when the tyres are cold.
Why the other answers don't fit
- A
- Decreased fuel consumption — Fuel use goes up with soft tyres, not down.
- C
- Decreased stopping distance — Stopping distances get longer, not shorter.
- D
- Increased tyre lifespan — A soft tyre wears faster at the edges and lasts less long.
Where this comes from
- Driving: the essential skills — section 14
Rule numbers link to The Highway Code on gov.uk.
Where this question comes from
The question, its options and the explanation are reproduced word for word from the DVSA revision question bank under licence. The licence requires them to appear unaltered, so we cannot reword them and neither can anyone else — that is why you will meet the same wording on other sites. Everything else on this page is written by Theory Hub: the explanation of why each wrong answer is wrong, the topic guide and the revision notes.
Asked in: Driving Instructor (ADI Part 1)
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