Tire Size Box

295/25R19 vs 295/30R19

295/30R19 compared with 295/25R19

+4.7% diameter, 0.0" width

295/30R19 is 25.97" tall vs 24.81". More than the 3% rule of thumb, so check carefully before switching.

24.8"19" rim2.9"11.6" wide
295/25R19 (solid) compared with 295/30R19 (dashed outline), drawn to scale

With 295/30R19 tires, when your speedometer says 60 mph you are really going

62.8 mph

295/30R19 is +1.16 inches (+4.7%) in overall diameter. That is more than the 3% most shops and makers recommend.

295/25R19295/30R19Difference%
Overall diameter24.81"25.97"+1.16"+4.7%
Section width11.61"11.61"0.00"0.0%
Sidewall height2.90"3.48"+0.58"+20.0%
Circumference77.93"81.58"+3.65"+4.7%
Revolutions per mile813.0776.6−36.4−4.5%

Speedometer difference

If your vehicle came with 295/25R19 and you fit 295/30R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.9 mph+0.9 mph
30 mph31.4 mph+1.4 mph
40 mph41.9 mph+1.9 mph
50 mph52.3 mph+2.3 mph
60 mph62.8 mph+2.8 mph
65 mph68.0 mph+3.0 mph
70 mph73.3 mph+3.3 mph
75 mph78.5 mph+3.5 mph
80 mph83.7 mph+3.7 mph

Each size on its own

Questions

Which is bigger, 295/25R19 or 295/30R19?
295/30R19 is taller by 1.16 inches (25.97" vs 24.81"). 295/25R19 is the same width.
Can I replace 295/25R19 with 295/30R19?
It is not recommended without checking carefully. The diameter difference is +4.7%, 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 295/30R19 change my speedometer?
When your speedometer reads 60 mph with 295/30R19 fitted (calibrated for 295/25R19), your real speed is 62.8 mph. Your odometer will under-count miles by about 4.7%.
Will 295/30R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.58 inches of ground clearance at the axle.

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