Tire Size Box

345/25R19 vs 345/35R19

345/35R19 compared with 345/25R19

+10.5% diameter, 0.0" width

345/35R19 is 28.51" tall vs 25.79". More than the 3% rule of thumb, so check carefully before switching.

25.8"19" rim3.4"13.6" wide
345/25R19 (solid) compared with 345/35R19 (dashed outline), drawn to scale

With 345/35R19 tires, when your speedometer says 60 mph you are really going

66.3 mph

345/35R19 is +2.72 inches (+10.5%) in overall diameter. That is more than the 3% most shops and makers recommend.

345/25R19345/35R19Difference%
Overall diameter25.79"28.51"+2.72"+10.5%
Section width13.58"13.58"0.00"0.0%
Sidewall height3.40"4.75"+1.36"+40.0%
Circumference81.03"89.56"+8.53"+10.5%
Revolutions per mile782.0707.5−74.5−9.5%

Speedometer difference

If your vehicle came with 345/25R19 and you fit 345/35R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph22.1 mph+2.1 mph
30 mph33.2 mph+3.2 mph
40 mph44.2 mph+4.2 mph
50 mph55.3 mph+5.3 mph
60 mph66.3 mph+6.3 mph
65 mph71.8 mph+6.8 mph
70 mph77.4 mph+7.4 mph
75 mph82.9 mph+7.9 mph
80 mph88.4 mph+8.4 mph

Each size on its own

Questions

Which is bigger, 345/25R19 or 345/35R19?
345/35R19 is taller by 2.72 inches (28.51" vs 25.79"). 345/25R19 is the same width.
Can I replace 345/25R19 with 345/35R19?
It is not recommended without checking carefully. The diameter difference is +10.5%, 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 345/35R19 change my speedometer?
When your speedometer reads 60 mph with 345/35R19 fitted (calibrated for 345/25R19), your real speed is 66.3 mph. Your odometer will under-count miles by about 10.5%.
Will 345/35R19 lift my vehicle?
Ride height changes by half the diameter difference: +1.36 inches of ground clearance at the axle.

Other comparisons