Tire Size Box

245/25R19 vs 245/35R19

245/35R19 compared with 245/25R19

+8.1% diameter, 0.0" width

245/35R19 is 25.75" tall vs 23.82". More than the 3% rule of thumb, so check carefully before switching.

23.8"19" rim2.4"9.6" wide
245/25R19 (solid) compared with 245/35R19 (dashed outline), drawn to scale

With 245/35R19 tires, when your speedometer says 60 mph you are really going

64.9 mph

245/35R19 is +1.93 inches (+8.1%) in overall diameter. That is more than the 3% most shops and makers recommend.

245/25R19245/35R19Difference%
Overall diameter23.82"25.75"+1.93"+8.1%
Section width9.65"9.65"0.00"0.0%
Sidewall height2.41"3.38"+0.96"+40.0%
Circumference74.84"80.90"+6.06"+8.1%
Revolutions per mile846.6783.2−63.4−7.5%

Speedometer difference

If your vehicle came with 245/25R19 and you fit 245/35R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.6 mph+1.6 mph
30 mph32.4 mph+2.4 mph
40 mph43.2 mph+3.2 mph
50 mph54.0 mph+4.0 mph
60 mph64.9 mph+4.9 mph
65 mph70.3 mph+5.3 mph
70 mph75.7 mph+5.7 mph
75 mph81.1 mph+6.1 mph
80 mph86.5 mph+6.5 mph

Each size on its own

Questions

Which is bigger, 245/25R19 or 245/35R19?
245/35R19 is taller by 1.93 inches (25.75" vs 23.82"). 245/25R19 is the same width.
Can I replace 245/25R19 with 245/35R19?
It is not recommended without checking carefully. The diameter difference is +8.1%, 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 245/35R19 change my speedometer?
When your speedometer reads 60 mph with 245/35R19 fitted (calibrated for 245/25R19), your real speed is 64.9 mph. Your odometer will under-count miles by about 8.1%.
Will 245/35R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.96 inches of ground clearance at the axle.

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