A 235/45R21 is 235 mm wide with a 106 mm sidewall (45 series) on a 21 inch wheel, 29.3 inches tall overall. A tire size only makes sense next to a wheel width and a car. 235/45R21 mounts on a range of widths, and the overall height decides whether the speedometer and the fender stay happy.
2 lines carry 235/45R21, from 2 brands (Hankook and Michelin). By type that is 1 performance summer and 1 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 235/45R21 lines that do both.
Common questions
What does 235/45R21 mean?
235 is the section width in millimeters, 45 is the sidewall height as a percent of that width (106 mm here), R means radial and 21 is the wheel diameter in inches. Overall the tire stands 29.3 inches tall.
Will 235/45R21 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 235/45R21?
The tire makers list 6 to 10.5 inch rim widths across the 235 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.
