Tire Size Box

205/75R16 vs 225/75R16

225/75R16 compared with 205/75R16

+4.2% diameter, +0.8" width

225/75R16 is 29.29" tall vs 28.11". More than the 3% rule of thumb, so check carefully before switching.

28.1"16" rim6.1"8.1" wide
205/75R16 (solid) compared with 225/75R16 (dashed outline), drawn to scale

With 225/75R16 tires, when your speedometer says 60 mph you are really going

62.5 mph

225/75R16 is +1.18 inches (+4.2%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/75R16225/75R16Difference%
Overall diameter28.11"29.29"+1.18"+4.2%
Section width8.07"8.86"+0.79"+9.8%
Sidewall height6.05"6.64"+0.59"+9.8%
Circumference88.30"92.01"+3.71"+4.2%
Revolutions per mile717.6688.6−28.9−4.0%

Speedometer difference

If your vehicle came with 205/75R16 and you fit 225/75R16, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.8 mph+0.8 mph
30 mph31.3 mph+1.3 mph
40 mph41.7 mph+1.7 mph
50 mph52.1 mph+2.1 mph
60 mph62.5 mph+2.5 mph
65 mph67.7 mph+2.7 mph
70 mph72.9 mph+2.9 mph
75 mph78.2 mph+3.2 mph
80 mph83.4 mph+3.4 mph

Each size on its own

Questions

Which is bigger, 205/75R16 or 225/75R16?
225/75R16 is taller by 1.18 inches (29.29" vs 28.11"). 225/75R16 is wider by 0.79 inches.
Can I replace 205/75R16 with 225/75R16?
It is not recommended without checking carefully. The diameter difference is +4.2%, more than the 3% most shops and makers allow. It will throw off the speedometer and may affect ABS, stability control and clearance.
How much will 225/75R16 change my speedometer?
When your speedometer reads 60 mph with 225/75R16 fitted (calibrated for 205/75R16), your real speed is 62.5 mph. Your odometer will under-count miles by about 4.2%.
Will 225/75R16 lift my vehicle?
Ride height changes by half the diameter difference: +0.59 inches of ground clearance at the axle.

Other comparisons