Tire Size Box

205/35R19 vs 205/45R19

205/45R19 compared with 205/35R19

+6.5% diameter, 0.0" width

205/45R19 is 26.26" tall vs 24.65". More than the 3% rule of thumb, so check carefully before switching.

24.6"19" rim2.8"8.1" wide
205/35R19 (solid) compared with 205/45R19 (dashed outline), drawn to scale

With 205/45R19 tires, when your speedometer says 60 mph you are really going

63.9 mph

205/45R19 is +1.61 inches (+6.5%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/35R19205/45R19Difference%
Overall diameter24.65"26.26"+1.61"+6.5%
Section width8.07"8.07"0.00"0.0%
Sidewall height2.82"3.63"+0.81"+28.6%
Circumference77.44"82.51"+5.07"+6.5%
Revolutions per mile818.2767.9−50.3−6.1%

Speedometer difference

If your vehicle came with 205/35R19 and you fit 205/45R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.3 mph+1.3 mph
30 mph32.0 mph+2.0 mph
40 mph42.6 mph+2.6 mph
50 mph53.3 mph+3.3 mph
60 mph63.9 mph+3.9 mph
65 mph69.3 mph+4.3 mph
70 mph74.6 mph+4.6 mph
75 mph79.9 mph+4.9 mph
80 mph85.2 mph+5.2 mph

Each size on its own

Questions

Which is bigger, 205/35R19 or 205/45R19?
205/45R19 is taller by 1.61 inches (26.26" vs 24.65"). 205/35R19 is the same width.
Can I replace 205/35R19 with 205/45R19?
It is not recommended without checking carefully. The diameter difference is +6.5%, 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 205/45R19 change my speedometer?
When your speedometer reads 60 mph with 205/45R19 fitted (calibrated for 205/35R19), your real speed is 63.9 mph. Your odometer will under-count miles by about 6.5%.
Will 205/45R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.81 inches of ground clearance at the axle.

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