Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/75r17 vs 295/70r18 Tire Comparison Side By Side
  295/75-17 295/70-18 Difference
Diameter inches (mm) 34.42 (874.3) 34.26 (870.2) -0.16 (-4.1) -0.5%
Width inches (mm) 11.61 (295) 11.61 (295) 0 (0) 0%
Circum. inches (mm) 108.14 (2746.69) 107.63 (2733.81) -0.51 (-12.88) -0.5%
Sidewall Height inches (mm) 8.71 (221.25) 8.13 (206.5) -0.58 (-14.75) -6.7%
Revolutions per mile (km) 585.92 (364.07) 588.68 (365.79) 2.76 (1.72) 0.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.91 mph (32.04 km/h)
25 mph (40.23 km/h)24.88 mph (40.05 km/h)
30 mph (48.28 km/h)29.86 mph (48.05 km/h)
35 mph (56.33 km/h)34.84 mph (56.06 km/h)
40 mph (64.37 km/h)39.81 mph (64.07 km/h)
45 mph (72.42 km/h)44.79 mph (72.08 km/h)
50 mph (80.47 km/h)49.77 mph (80.09 km/h)
55 mph (88.51 km/h)54.74 mph (88.1 km/h)
60 mph (96.56 km/h)59.72 mph (96.11 km/h)
65 mph (104.61 km/h)64.7 mph (104.12 km/h)
70 mph (112.65 km/h)69.67 mph (112.13 km/h)
75 mph (120.7 km/h)74.65 mph (120.14 km/h)
80 mph (128.75 km/h)79.62 mph (128.14 km/h)
85 mph (136.79 km/h)84.6 mph (136.15 km/h)
90 mph (144.84 km/h)89.58 mph (144.16 km/h)
95 mph (152.89 km/h)94.55 mph (152.17 km/h)
100 mph (160.93 km/h)99.53 mph (160.18 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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