Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/70r17 vs 195/50r19 Tire Comparison Side By Side
  195/70-17 195/50-19 Difference
Diameter inches (mm) 27.75 (704.8) 26.68 (677.6) -1.07 (-27.2) -3.9%
Width inches (mm) 7.68 (195) 7.68 (195) 0 (0) 0%
Circum. inches (mm) 87.17 (2214.19) 83.81 (2128.74) -3.36 (-85.45) -3.9%
Sidewall Height inches (mm) 5.37 (136.5) 3.84 (97.5) -1.54 (-39) -28.6%
Revolutions per mile (km) 726.83 (451.63) 756.01 (469.76) 29.18 (18.13) 4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.23 mph (30.94 km/h)
25 mph (40.23 km/h)24.04 mph (38.68 km/h)
30 mph (48.28 km/h)28.84 mph (46.42 km/h)
35 mph (56.33 km/h)33.65 mph (54.15 km/h)
40 mph (64.37 km/h)38.46 mph (61.89 km/h)
45 mph (72.42 km/h)43.26 mph (69.63 km/h)
50 mph (80.47 km/h)48.07 mph (77.36 km/h)
55 mph (88.51 km/h)52.88 mph (85.1 km/h)
60 mph (96.56 km/h)57.68 mph (92.83 km/h)
65 mph (104.61 km/h)62.49 mph (100.57 km/h)
70 mph (112.65 km/h)67.3 mph (108.31 km/h)
75 mph (120.7 km/h)72.11 mph (116.04 km/h)
80 mph (128.75 km/h)76.91 mph (123.78 km/h)
85 mph (136.79 km/h)81.72 mph (131.52 km/h)
90 mph (144.84 km/h)86.53 mph (139.25 km/h)
95 mph (152.89 km/h)91.33 mph (146.99 km/h)
100 mph (160.93 km/h)96.14 mph (154.72 km/h)

Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35 2.73 2.94 3.07 3.21 3.31 3.42 3.55 3.73 3.91 4.11 4.27 4.56 4.88 5.13 5.29 5.38 5.71 6.17 7.17
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