Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/60r15 vs 235/75r15 Tire Comparison Side By Side
  295/60-15 235/75-15 Difference
Diameter inches (mm) 28.94 (735) 28.88 (733.5) -0.06 (-1.5) -0.2%
Width inches (mm) 11.61 (295) 9.25 (235) -2.36 (-60) -20.3%
Circum. inches (mm) 90.91 (2309.07) 90.72 (2304.36) -0.19 (-4.71) -0.2%
Sidewall Height inches (mm) 6.97 (177) 6.94 (176.25) -0.03 (-0.75) -0.4%
Revolutions per mile (km) 696.97 (433.07) 698.39 (433.96) 1.43 (0.89) 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)24.95 mph (40.15 km/h)
30 mph (48.28 km/h)29.94 mph (48.18 km/h)
35 mph (56.33 km/h)34.93 mph (56.21 km/h)
40 mph (64.37 km/h)39.92 mph (64.24 km/h)
45 mph (72.42 km/h)44.91 mph (72.27 km/h)
50 mph (80.47 km/h)49.9 mph (80.3 km/h)
55 mph (88.51 km/h)54.89 mph (88.33 km/h)
60 mph (96.56 km/h)59.88 mph (96.36 km/h)
65 mph (104.61 km/h)64.87 mph (104.39 km/h)
70 mph (112.65 km/h)69.86 mph (112.42 km/h)
75 mph (120.7 km/h)74.85 mph (120.45 km/h)
80 mph (128.75 km/h)79.84 mph (128.49 km/h)
85 mph (136.79 km/h)84.83 mph (136.52 km/h)
90 mph (144.84 km/h)89.82 mph (144.55 km/h)
95 mph (152.89 km/h)94.81 mph (152.58 km/h)
100 mph (160.93 km/h)99.8 mph (160.61 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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