Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
305/75r17 vs 35/11.5r17 Tire Comparison Side By Side
  305/75-17 35/11.5-17 Difference
Diameter inches (mm) 35.01 (889.3) 34.93 (887.32) -0.08 (-1.98) -0.2%
Width inches (mm) 12.01 (305) 11.5 (292) -0.51 (-13) -4.3%
Circum. inches (mm) 109.99 (2793.82) 109.75 (2787.6) -0.24 (-6.22) -0.2%
Sidewall Height inches (mm) 9.01 (228.75) 8.97 (227.76) -0.04 (-0.99) -0.4%
Revolutions per mile (km) 576.04 (357.93) 577.32 (358.73) 1.29 (0.8) 0.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.96 mph (32.12 km/h)
25 mph (40.23 km/h)24.94 mph (40.14 km/h)
30 mph (48.28 km/h)29.93 mph (48.17 km/h)
35 mph (56.33 km/h)34.92 mph (56.2 km/h)
40 mph (64.37 km/h)39.91 mph (64.23 km/h)
45 mph (72.42 km/h)44.9 mph (72.26 km/h)
50 mph (80.47 km/h)49.89 mph (80.29 km/h)
55 mph (88.51 km/h)54.88 mph (88.32 km/h)
60 mph (96.56 km/h)59.87 mph (96.35 km/h)
65 mph (104.61 km/h)64.86 mph (104.37 km/h)
70 mph (112.65 km/h)69.84 mph (112.4 km/h)
75 mph (120.7 km/h)74.83 mph (120.43 km/h)
80 mph (128.75 km/h)79.82 mph (128.46 km/h)
85 mph (136.79 km/h)84.81 mph (136.49 km/h)
90 mph (144.84 km/h)89.8 mph (144.52 km/h)
95 mph (152.89 km/h)94.79 mph (152.55 km/h)
100 mph (160.93 km/h)99.78 mph (160.58 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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