Two views on how large-diameter and wide tyres affect fuel use, and the role of mass, rolling resistance and profile height.
Drivers who fit wide, large-diameter tyres for looks rarely consider the effect on fuel consumption. The topic splits opinion into two camps.
- One side argues that turning a larger wheel takes more effort, with consumption rising especially above 40–50 km/h.
- The other holds that total vehicle weight and aerodynamics are the main factors.
Calculations show consumption rising with profile height. Wider tyres are heavier and have a larger contact patch, which increases rolling resistance and fuel use. The safest choice is the size recommended by the vehicle manufacturer.