Tire Size Box

325/25R19 vs 325/35R19

325/35R19 compared with 325/25R19

+10.1% diameter, 0.0" width

325/35R19 is 27.96" tall vs 25.40". More than the 3% rule of thumb, so check carefully before switching.

25.4"19" rim3.2"12.8" wide
325/25R19 (solid) compared with 325/35R19 (dashed outline), drawn to scale

With 325/35R19 tires, when your speedometer says 60 mph you are really going

66.0 mph

325/35R19 is +2.56 inches (+10.1%) in overall diameter. That is more than the 3% most shops and makers recommend.

325/25R19325/35R19Difference%
Overall diameter25.40"27.96"+2.56"+10.1%
Section width12.80"12.80"0.00"0.0%
Sidewall height3.20"4.48"+1.28"+40.0%
Circumference79.79"87.83"+8.04"+10.1%
Revolutions per mile794.1721.4−72.7−9.2%

Speedometer difference

If your vehicle came with 325/25R19 and you fit 325/35R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph22.0 mph+2.0 mph
30 mph33.0 mph+3.0 mph
40 mph44.0 mph+4.0 mph
50 mph55.0 mph+5.0 mph
60 mph66.0 mph+6.0 mph
65 mph71.5 mph+6.5 mph
70 mph77.1 mph+7.1 mph
75 mph82.6 mph+7.6 mph
80 mph88.1 mph+8.1 mph

Each size on its own

Questions

Which is bigger, 325/25R19 or 325/35R19?
325/35R19 is taller by 2.56 inches (27.96" vs 25.40"). 325/25R19 is the same width.
Can I replace 325/25R19 with 325/35R19?
It is not recommended without checking carefully. The diameter difference is +10.1%, 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 325/35R19 change my speedometer?
When your speedometer reads 60 mph with 325/35R19 fitted (calibrated for 325/25R19), your real speed is 66.0 mph. Your odometer will under-count miles by about 10.1%.
Will 325/35R19 lift my vehicle?
Ride height changes by half the diameter difference: +1.28 inches of ground clearance at the axle.

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