Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/55r20 vs 285/75r16 Tire Comparison Side By Side
  295/55-20 285/75-16 Difference
Diameter inches (mm) 32.78 (832.5) 32.83 (833.9) 0.06 (1.4) 0.2%
Width inches (mm) 11.61 (295) 11.22 (285) -0.39 (-10) -3.4%
Circum. inches (mm) 102.97 (2615.38) 103.14 (2619.77) 0.17 (4.4) 0.2%
Sidewall Height inches (mm) 6.39 (162.25) 8.42 (213.75) 2.03 (51.5) 31.7%
Revolutions per mile (km) 615.34 (382.35) 614.31 (381.71) -1.03 (-0.64) -0.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.03 mph (32.24 km/h)
25 mph (40.23 km/h)25.04 mph (40.3 km/h)
30 mph (48.28 km/h)30.05 mph (48.36 km/h)
35 mph (56.33 km/h)35.06 mph (56.42 km/h)
40 mph (64.37 km/h)40.07 mph (64.48 km/h)
45 mph (72.42 km/h)45.08 mph (72.54 km/h)
50 mph (80.47 km/h)50.08 mph (80.6 km/h)
55 mph (88.51 km/h)55.09 mph (88.66 km/h)
60 mph (96.56 km/h)60.1 mph (96.72 km/h)
65 mph (104.61 km/h)65.11 mph (104.78 km/h)
70 mph (112.65 km/h)70.12 mph (112.84 km/h)
75 mph (120.7 km/h)75.13 mph (120.9 km/h)
80 mph (128.75 km/h)80.13 mph (128.96 km/h)
85 mph (136.79 km/h)85.14 mph (137.02 km/h)
90 mph (144.84 km/h)90.15 mph (145.08 km/h)
95 mph (152.89 km/h)95.16 mph (153.15 km/h)
100 mph (160.93 km/h)100.17 mph (161.21 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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