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255/60R19 vs 265/55R20 tire size comparison

255/60R19265/55R20

265/55R20 is 0.5 in (1.38%) taller than 255/60R19 and 0.4 in wider. They fit different wheels: 255/60R19 a 19-inch wheel and 265/55R20 a 20-inch wheel.

255/60R19 and 265/55R20 side by side

+0.5 in / +1.38%255/60R19: 31.0 in tall, solid line265/55R20: 31.5 in tall, dashed line255/60R19Width 10.0 in (255 mm)Sidewall 6.0 in (153 mm)265/55R20Width 10.4 in (265 mm)Sidewall 5.7 in (146 mm)
255/60R19 is drawn with a solid line and 265/55R20 with a dashed line. In each drawing both tires are to the same scale; the tread shoulder and bead curves are simplified. The table below has the same numbers.
Dimensions of 255/60R19 and 265/55R20, with the difference (265/55R20 minus 255/60R19)
Measurement255/60R19265/55R20DifferenceDifference %
Section width10.0 in (255 mm)10.4 in (265 mm)+0.4 in (+10 mm)+3.92%
Sidewall height6.0 in (153 mm)5.7 in (146 mm)-0.3 in (-7 mm)-4.74%
Wheel (rim) diameter19.0 in (483 mm)20.0 in (508 mm)+1.0 in (+25 mm)+5.26%
Overall diameter31.0 in (789 mm)31.5 in (800 mm)+0.5 in (+11 mm)+1.38%
Circumference97.5 in (2477 mm)98.9 in (2512 mm)+1.4 in (+35 mm)+1.38%
Revolutions per mile650641-9-1.36%

Differences are 265/55R20 minus 255/60R19; percentages are relative to 255/60R19. These are nominal design dimensions. Real tires vary by brand, tread depth, wheel width, load and pressure.

The overall diameter differs by 1.38%, which is within the common 3% rule of thumb.

The rule of thumb keeps a replacement size within about 3% of the original overall diameter. It covers diameter only. It is not a fit, load or safety check, because width, wheel diameter, load capacity and clearance matter too. Confirm any size change with your vehicle's owner's manual or a tire professional.

Speedometer difference

When the speedometer reads 60 mph on a vehicle built for 255/60R19, the actual speed on 265/55R20 is about 60.8 mph. When it reads 60 mph on a vehicle built for 265/55R20, the actual speed on 255/60R19 is about 59.2 mph. These figures assume the speedometer is accurate on the original size and use nominal dimensions, so treat them as estimates.

Actual speed for a given speedometer reading, 255/60R19 against 265/55R20
Speedometer readsActual on 265/55R20 (built for 255/60R19)Actual on 255/60R19 (built for 265/55R20)
20 mph20.3 mph19.7 mph
30 mph30.4 mph29.6 mph
40 mph40.6 mph39.5 mph
50 mph50.7 mph49.3 mph
60 mph60.8 mph59.2 mph
70 mph71.0 mph69.0 mph
80 mph81.1 mph78.9 mph

A common rule of thumb is to keep a replacement size within about 3% of the original overall diameter. Check the tire placard on the driver's door jamb and your owner's manual for the sizes your vehicle was built for. Confirm any size change with your vehicle's owner's manual or a tire professional.

Which vehicles use each size?

These vehicles list the size among their verified sizes, by trim. Open one to see all of its sizes.

Check it in the calculator

The calculator takes the same two sizes and shows the full comparison, or lets you swap either one for another size.

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Shop for 255/60R19 or 265/55R20 tires

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Other comparisons with 255/60R19

Side-by-side dimensions and speedometer difference for sizes close to 255/60R19 in overall diameter.

Other comparisons with 265/55R20

Side-by-side dimensions and speedometer difference for sizes close to 265/55R20 in overall diameter.

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