Menu

285/45 R21 tire dimensions

Nominal geometric dimensions, calculated from the size marking.

Enter your tire size

Original tire size

Your results

789.9 mm

Overall diameter · 285/45 R21

Calculate to see all six dimensions.

What 285/45 R21 means

Nominal section width285 mm
Sidewall-to-width ratio45%
Sidewall height128 mm
ConstructionR — radial
Wheel bead-seat diameter21 inches
Overall diameter790 mm (31.1 in)
Rolling circumference2482 mm

Load index, speed rating and approved wheel widths must also match the vehicle requirements. Calculated dimensions do not establish a safe replacement size. Actual rolling circumference changes with load, pressure, wear and tire construction.

Compare with another size →

Vehicles with 285/45 R21 tires

Configurations in the catalogue recorded with this size. Equipment varies by market and trim.