Tire Size Box

195/70R14 vs 165/75R15

165/75R15 compared with 195/70R14

0.0% diameter, −1.2" width

165/75R15 is 24.74" tall vs 24.75". Within the 3% rule, so usually interchangeable.

24.7"14" rim5.4"7.7" wide
195/70R14 (solid) compared with 165/75R15 (dashed outline), drawn to scale

With 165/75R15 tires, when your speedometer says 60 mph you are really going

60.0 mph

165/75R15 is 0.00 inches (0.0%) in overall diameter. That is within the 3% most shops and makers allow.

195/70R14165/75R15Difference%
Overall diameter24.75"24.74"0.00"0.0%
Section width7.68"6.50"−1.18"−15.4%
Sidewall height5.37"4.87"−0.50"−9.3%
Circumference77.75"77.74"−0.01"0.0%
Revolutions per mile814.9815.1+0.10.0%

Speedometer difference

If your vehicle came with 195/70R14 and you fit 165/75R15, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.0 mph0.0 mph
30 mph30.0 mph0.0 mph
40 mph40.0 mph0.0 mph
50 mph50.0 mph0.0 mph
60 mph60.0 mph0.0 mph
65 mph65.0 mph0.0 mph
70 mph70.0 mph0.0 mph
75 mph75.0 mph0.0 mph
80 mph80.0 mph0.0 mph

Each size on its own

Questions

Which is bigger, 195/70R14 or 165/75R15?
They are the same overall diameter, 24.75 inches.
Can I replace 195/70R14 with 165/75R15?
Usually, yes. The diameter difference is 0.0%, inside the 3% rule of thumb most tire shops use. Check that the wider or taller tire clears your suspension and fenders, and that its load index meets your placard.
How much will 165/75R15 change my speedometer?
When your speedometer reads 60 mph with 165/75R15 fitted (calibrated for 195/70R14), your real speed is 60.0 mph. Your odometer will over-count miles by about 0.0%.
Will 165/75R15 lift my vehicle?
Ride height changes by half the diameter difference: 0.00 inches of ground clearance at the axle.

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