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225/75R15 vs 235/50R19 tire size comparison

225/75R15235/50R19

235/50R19 is 1 mm (0.13%) shorter than 225/75R15 and 0.4 in wider. They fit different wheels: 225/75R15 a 15-inch wheel and 235/50R19 a 19-inch wheel.

225/75R15 and 235/50R19 side by side

0.0 in / -0.13%225/75R15: 28.3 in tall, solid line235/50R19: 28.3 in tall, dashed line225/75R15Width 8.9 in (225 mm)Sidewall 6.6 in (169 mm)235/50R19Width 9.3 in (235 mm)Sidewall 4.6 in (118 mm)
225/75R15 is drawn with a solid line and 235/50R19 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 225/75R15 and 235/50R19, with the difference (235/50R19 minus 225/75R15)
Measurement225/75R15235/50R19DifferenceDifference %
Section width8.9 in (225 mm)9.3 in (235 mm)+0.4 in (+10 mm)+4.44%
Sidewall height6.6 in (169 mm)4.6 in (118 mm)-2.0 in (-51 mm)-30.37%
Wheel (rim) diameter15.0 in (381 mm)19.0 in (483 mm)+4.0 in (+102 mm)+26.67%
Overall diameter28.3 in (719 mm)28.3 in (718 mm)0.0 in (-1 mm)-0.13%
Circumference88.9 in (2257 mm)88.8 in (2254 mm)-0.1 in (-3 mm)-0.13%
Revolutions per mile713714+1+0.13%

Differences are 235/50R19 minus 225/75R15; percentages are relative to 225/75R15. These are nominal design dimensions. Real tires vary by brand, tread depth, wheel width, load and pressure.

The overall diameter differs by 0.13%, 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 225/75R15, the actual speed on 235/50R19 is about 59.9 mph. When it reads 60 mph on a vehicle built for 235/50R19, the actual speed on 225/75R15 is about 60.1 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, 225/75R15 against 235/50R19
Speedometer readsActual on 235/50R19 (built for 225/75R15)Actual on 225/75R15 (built for 235/50R19)
20 mph20.0 mph20.0 mph
30 mph30.0 mph30.0 mph
40 mph39.9 mph40.1 mph
50 mph49.9 mph50.1 mph
60 mph59.9 mph60.1 mph
70 mph69.9 mph70.1 mph
80 mph79.9 mph80.1 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.

Open this comparison in the calculator

Shop for 225/75R15 or 235/50R19 tires

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Other comparisons with 225/75R15

Side-by-side dimensions and speedometer difference for sizes close to 225/75R15 in overall diameter.

Other comparisons with 235/50R19

Side-by-side dimensions and speedometer difference for sizes close to 235/50R19 in overall diameter.

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