Compare overall diameter, circumference and approximate speedometer effect between two tire sizes.
Results are for information and preliminary estimation. For critical technical work, manufacturer data, local codes and qualified professional review take precedence.
Sidewall height = section width × aspect ratio. Diameter = rim diameter + 2 × sidewall. Speed effect follows the circumference ratio.
Compare 205/55 R16 with an alternative size and see the percentage diameter change.
Automotive estimates are highly sensitive to driving conditions. For consumption, tire sizing and charging, the vehicle manufacturer’s approved limits remain the final reference.
Use only sizes approved for the vehicle; suspension, braking and electronic systems can be affected.
A different rolling circumference changes distance travelled per wheel revolution.
Tell us if a calculation is unclear, incomplete or appears incorrect.