What does 285/40R21 mean?

285 is the section width in millimeters, 40 is the sidewall height as a percent of that width (114 mm here), R means radial and 21 is the wheel diameter in inches. Overall the tire stands 30 inches tall.

Will 285/40R21 fit your car?

Pick your year, make and model and the tires page answers it for yours. The wheel width has to carry the section width and the overall height has to stay near where the car started.

What wheel width fits 285/40R21?

The tire makers list 7 to 11.5 inch rim widths across the 285 mm sizes we carry, and each product page shows the range for that line. Pick a 21 inch wheel set and the tire step checks the width for you.

285/40R21 tires

12 tire lines. 285/40R21 tires sized to your wheels and your car.

About 285/40R21 tires

A 285/40R21 is 285 mm wide with a 114 mm sidewall (40 series) on a 21 inch wheel, 30 inches tall overall. A tire size only makes sense next to a wheel width and a car. 285/40R21 mounts on a range of widths, and the overall height decides whether the speedometer and the fender stay happy.

12 lines carry 285/40R21, from 5 brands (Continental Tire, Hankook, Pirelli, Michelin and 1 more). By type that is 6 performance summer and 6 all season. The tire has to stay near your car's stock height and mount on your wheel width, so pick the car and the wheel set and the page keeps only the 285/40R21 lines that do both.

Common questions

What does 285/40R21 mean?: 285 is the section width in millimeters, 40 is the sidewall height as a percent of that width (114 mm here), R means radial and 21 is the wheel diameter in inches. Overall the tire stands 30 inches tall.
Will 285/40R21 fit your car?: Pick your year, make and model and the tires page answers it for yours. The wheel width has to carry the section width and the overall height has to stay near where the car started.
What wheel width fits 285/40R21?: The tire makers list 7 to 11.5 inch rim widths across the 285 mm sizes we carry, and each product page shows the range for that line. Pick a 21 inch wheel set and the tire step checks the width for you.