Tire Size Box

195/35R17 vs 195/45R17

195/45R17 compared with 195/35R17

+6.9% diameter, 0.0" width

195/45R17 is 23.91" tall vs 22.37". More than the 3% rule of thumb, so check carefully before switching.

22.4"17" rim2.7"7.7" wide
195/35R17 (solid) compared with 195/45R17 (dashed outline), drawn to scale

With 195/45R17 tires, when your speedometer says 60 mph you are really going

64.1 mph

195/45R17 is +1.54 inches (+6.9%) in overall diameter. That is more than the 3% most shops and makers recommend.

195/35R17195/45R17Difference%
Overall diameter22.37"23.91"+1.54"+6.9%
Section width7.68"7.68"0.00"0.0%
Sidewall height2.69"3.45"+0.77"+28.6%
Circumference70.29"75.11"+4.82"+6.9%
Revolutions per mile901.4843.5−57.9−6.4%

Speedometer difference

If your vehicle came with 195/35R17 and you fit 195/45R17, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.4 mph+1.4 mph
30 mph32.1 mph+2.1 mph
40 mph42.7 mph+2.7 mph
50 mph53.4 mph+3.4 mph
60 mph64.1 mph+4.1 mph
65 mph69.5 mph+4.5 mph
70 mph74.8 mph+4.8 mph
75 mph80.1 mph+5.1 mph
80 mph85.5 mph+5.5 mph

Each size on its own

Questions

Which is bigger, 195/35R17 or 195/45R17?
195/45R17 is taller by 1.54 inches (23.91" vs 22.37"). 195/35R17 is the same width.
Can I replace 195/35R17 with 195/45R17?
It is not recommended without checking carefully. The diameter difference is +6.9%, 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 195/45R17 change my speedometer?
When your speedometer reads 60 mph with 195/45R17 fitted (calibrated for 195/35R17), your real speed is 64.1 mph. Your odometer will under-count miles by about 6.9%.
Will 195/45R17 lift my vehicle?
Ride height changes by half the diameter difference: +0.77 inches of ground clearance at the axle.

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