Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/75r15 vs 205/70r15 Tire Comparison Side By Side
  195/75-15 205/70-15 Difference
Diameter inches (mm) 26.52 (673.5) 26.3 (668) -0.22 (-5.5) -0.8%
Width inches (mm) 7.68 (195) 8.07 (205) 0.39 (10) 5.1%
Circum. inches (mm) 83.3 (2115.86) 82.62 (2098.58) -0.68 (-17.28) -0.8%
Sidewall Height inches (mm) 5.76 (146.25) 5.65 (143.5) -0.11 (-2.75) -1.9%
Revolutions per mile (km) 760.61 (472.62) 766.87 (476.51) 6.26 (3.89) 0.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.84 mph (31.92 km/h)
25 mph (40.23 km/h)24.8 mph (39.91 km/h)
30 mph (48.28 km/h)29.76 mph (47.89 km/h)
35 mph (56.33 km/h)34.71 mph (55.87 km/h)
40 mph (64.37 km/h)39.67 mph (63.85 km/h)
45 mph (72.42 km/h)44.63 mph (71.83 km/h)
50 mph (80.47 km/h)49.59 mph (79.81 km/h)
55 mph (88.51 km/h)54.55 mph (87.79 km/h)
60 mph (96.56 km/h)59.51 mph (95.77 km/h)
65 mph (104.61 km/h)64.47 mph (103.75 km/h)
70 mph (112.65 km/h)69.43 mph (111.73 km/h)
75 mph (120.7 km/h)74.39 mph (119.72 km/h)
80 mph (128.75 km/h)79.35 mph (127.7 km/h)
85 mph (136.79 km/h)84.31 mph (135.68 km/h)
90 mph (144.84 km/h)89.27 mph (143.66 km/h)
95 mph (152.89 km/h)94.22 mph (151.64 km/h)
100 mph (160.93 km/h)99.18 mph (159.62 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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