Most drivers are aware that tyre pressure affects fuel economy, but the full relationship between tyre condition and fuel consumption is broader than that. The type of tyre, its age, and how it is maintained all influence how efficiently your car uses fuel — with measurable effects on running costs over time.
Tyre Pressure and Rolling Resistance
An under-inflated tyre has a larger contact patch with the road and greater flex in its sidewalls. This increases rolling resistance — the energy the engine must expend to keep the tyre moving. Research suggests that tyres running 20 percent below recommended pressure can reduce fuel economy by around 1 to 2 percent. Across the average UK annual mileage, this adds up to a meaningful cost, particularly at current fuel prices.
The Role of Rolling Resistance Ratings
The EU tyre label rates tyres on fuel efficiency from A to G, directly reflecting their rolling resistance. An A-rated tyre can deliver fuel savings of several percent over a G-rated equivalent across the life of the tyre. When choosing replacement tyres, this rating is worth considering alongside purchase price — a more efficient tyre often pays back its higher cost through fuel savings.
Worn Tyres and Fuel Consumption
As tyres wear, their rolling characteristics change. While the relationship between tread depth and fuel economy is less straightforward than pressure, significantly worn tyres can affect the overall mechanical efficiency of the vehicle. Tyres that have aged and hardened through UV degradation also display different rolling properties than new rubber.
Keep Your Tyres in Peak Condition
Regular pressure checks and timely replacement — both services our mobile tyre team in Huddersfield can help with — are among the most cost-effective ways to protect your fuel economy. Call 01484 627456 to arrange a visit.
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