My Tire Guide

265/45R21 tire size

A 265/45R21 tire stands 30.4 inches tall and 10.4 inches wide, with a 4.7-inch sidewall on a 21-inch rim.

30.4″OVERALL 30.4 IN · RIM 21 IN10.4″4.7″WIDTH · SIDEWALL
Overall height
30.4 in772 mm
Section width
10.4 in265 mm
Sidewall height
4.7 in119 mm
Rim diameter
21 in533 mm
Circumference
95.5 in2425 mm
Revolutions per mile
664412 per km
Inch size
30.4x10.4R21

Compare it with any other size in the tire size calculator.

Sizes you can swap to

These 21-inch sizes are within two width steps and 3% of a 265/45R21's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 245/50R21, 0.8% taller (0.26 in). Wider sizes also need room in the wheel well and a rim width that suits them.

SizeHeightWidthAt 60 mph
245/50R21+0.8%+0.26 in−20 mm60.5 mph
255/45R21−1.2%−0.35 in−10 mm59.3 mph
275/45R21+1.2%+0.35 in+10 mm60.7 mph
285/40R21−1.4%−0.41 in+20 mm59.2 mph
255/50R21+2.1%+0.65 in−10 mm61.3 mph
285/45R21+2.3%+0.71 in+20 mm61.4 mph
245/45R21−2.3%−0.71 in−20 mm58.6 mph
275/40R21−2.4%−0.73 in+10 mm58.6 mph

Plus and minus sizes

Changing rim size means changing the sidewall to keep the same overall height. On 19-inch or 20-inch or 22-inch rims, these are the closest matches to a 265/45R21.

SizeHeightWidthAt 60 mph
265/55R19+0.3%+0.09 in±0 mm60.2 mph
265/50R20+0.1%+0.04 in±0 mm60.1 mph
265/40R22−0.1%−0.04 in±0 mm59.9 mph

Other 21-inch sizes near 265/45R21

265 mm wide, other sidewalls

45 series, other widths

See the other sizes for this rim on 21-inch tire sizes.

Shop 265/45R21 tires

These open each store's own list of 265/45R21 tires, where you can filter by type, load and speed rating.

265/45R21 questions

How tall is a 265/45R21 tire?

About 30.4 inches (772 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.

What does 265/45R21 mean?

265 is the section width in millimetres (10.4 in). 45 means the sidewall is 45% of that width: 119 mm, or 4.7 in. R means radial construction, and 21 is the rim diameter in inches.

Can I use 275/45R21 instead of 265/45R21?

275/45R21 is 1.2% taller (0.35 in) and 10 mm wider, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 60.7 mph. Make sure the extra width clears the suspension and fender liner at full lock.

What is 265/45R21 in inches?

In inch terms it is 30.4x10.4R21: 30.4 inches tall, 10.4 inches wide, for a 21-inch rim.

How many revolutions per mile does a 265/45R21 make?

About 664 turns per mile, worked out from its unloaded circumference of 95.5 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.