Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/50r15 vs 195/45r16 Tire Comparison Side By Side
  205/50-15 195/45-16 Difference
Diameter inches (mm) 23.07 (586) 22.91 (581.9) -0.16 (-4.1) -0.7%
Width inches (mm) 8.07 (205) 7.68 (195) -0.39 (-10) -4.9%
Circum. inches (mm) 72.48 (1840.97) 71.97 (1828.09) -0.51 (-12.88) -0.7%
Sidewall Height inches (mm) 4.04 (102.5) 3.45 (87.75) -0.58 (-14.75) -14.4%
Revolutions per mile (km) 874.18 (543.19) 880.34 (547.02) 6.16 (3.83) 0.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.86 mph (31.96 km/h)
25 mph (40.23 km/h)24.83 mph (39.95 km/h)
30 mph (48.28 km/h)29.79 mph (47.94 km/h)
35 mph (56.33 km/h)34.76 mph (55.93 km/h)
40 mph (64.37 km/h)39.72 mph (63.92 km/h)
45 mph (72.42 km/h)44.69 mph (71.91 km/h)
50 mph (80.47 km/h)49.65 mph (79.9 km/h)
55 mph (88.51 km/h)54.62 mph (87.89 km/h)
60 mph (96.56 km/h)59.58 mph (95.89 km/h)
65 mph (104.61 km/h)64.55 mph (103.88 km/h)
70 mph (112.65 km/h)69.51 mph (111.87 km/h)
75 mph (120.7 km/h)74.48 mph (119.86 km/h)
80 mph (128.75 km/h)79.44 mph (127.85 km/h)
85 mph (136.79 km/h)84.41 mph (135.84 km/h)
90 mph (144.84 km/h)89.37 mph (143.83 km/h)
95 mph (152.89 km/h)94.34 mph (151.82 km/h)
100 mph (160.93 km/h)99.3 mph (159.81 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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