Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/40r17 vs 165/35r17 Tire Comparison Side By Side
  195/40-17 165/35-17 Difference
Diameter inches (mm) 23.14 (587.8) 21.55 (547.3) -1.59 (-40.5) -6.9%
Width inches (mm) 7.68 (195) 6.5 (165) -1.18 (-30) -15.4%
Circum. inches (mm) 72.7 (1846.63) 67.69 (1719.39) -5.01 (-127.23) -6.9%
Sidewall Height inches (mm) 3.07 (78) 2.27 (57.75) -0.8 (-20.25) -26%
Revolutions per mile (km) 871.5 (541.53) 936 (581.6) 64.49 (40.07) 7.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.62 mph (29.97 km/h)
25 mph (40.23 km/h)23.28 mph (37.46 km/h)
30 mph (48.28 km/h)27.93 mph (44.95 km/h)
35 mph (56.33 km/h)32.59 mph (52.45 km/h)
40 mph (64.37 km/h)37.24 mph (59.94 km/h)
45 mph (72.42 km/h)41.9 mph (67.43 km/h)
50 mph (80.47 km/h)46.55 mph (74.92 km/h)
55 mph (88.51 km/h)51.21 mph (82.42 km/h)
60 mph (96.56 km/h)55.87 mph (89.91 km/h)
65 mph (104.61 km/h)60.52 mph (97.4 km/h)
70 mph (112.65 km/h)65.18 mph (104.89 km/h)
75 mph (120.7 km/h)69.83 mph (112.38 km/h)
80 mph (128.75 km/h)74.49 mph (119.88 km/h)
85 mph (136.79 km/h)79.14 mph (127.37 km/h)
90 mph (144.84 km/h)83.8 mph (134.86 km/h)
95 mph (152.89 km/h)88.45 mph (142.35 km/h)
100 mph (160.93 km/h)93.11 mph (149.85 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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