Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
305/35r22 vs 295/45r20 Tire Comparison Side By Side
  305/35-22 295/45-20 Difference
Diameter inches (mm) 30.41 (772.3) 30.45 (773.5) 0.05 (1.2) 0.2%
Width inches (mm) 12.01 (305) 11.61 (295) -0.39 (-10) -3.3%
Circum. inches (mm) 95.52 (2426.25) 95.67 (2430.02) 0.15 (3.77) 0.2%
Sidewall Height inches (mm) 4.2 (106.75) 5.23 (132.75) 1.02 (26) 24.4%
Revolutions per mile (km) 663.3 (412.16) 662.28 (411.52) -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)35.05 mph (56.41 km/h)
40 mph (64.37 km/h)40.06 mph (64.47 km/h)
45 mph (72.42 km/h)45.07 mph (72.53 km/h)
50 mph (80.47 km/h)50.08 mph (80.59 km/h)
55 mph (88.51 km/h)55.09 mph (88.65 km/h)
60 mph (96.56 km/h)60.09 mph (96.71 km/h)
65 mph (104.61 km/h)65.1 mph (104.77 km/h)
70 mph (112.65 km/h)70.11 mph (112.83 km/h)
75 mph (120.7 km/h)75.12 mph (120.89 km/h)
80 mph (128.75 km/h)80.12 mph (128.95 km/h)
85 mph (136.79 km/h)85.13 mph (137.01 km/h)
90 mph (144.84 km/h)90.14 mph (145.07 km/h)
95 mph (152.89 km/h)95.15 mph (153.13 km/h)
100 mph (160.93 km/h)100.16 mph (161.18 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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