Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
305/45r22 vs 35/12.5r22 Tire Comparison Side By Side
  305/45-22 35/12.5-22 Difference
Diameter inches (mm) 32.81 (833.3) 35.02 (889.52) 2.21 (56.22) 6.7%
Width inches (mm) 12.01 (305) 12.52 (318) 0.51 (13) 4.3%
Circum. inches (mm) 103.07 (2617.89) 110.02 (2794.51) 6.95 (176.62) 6.7%
Sidewall Height inches (mm) 5.4 (137.25) 6.51 (165.36) 1.11 (28.11) 20.5%
Revolutions per mile (km) 614.75 (381.99) 575.89 (357.84) -38.85 (-24.14) -6.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.35 mph (34.36 km/h)
25 mph (40.23 km/h)26.69 mph (42.95 km/h)
30 mph (48.28 km/h)32.02 mph (51.54 km/h)
35 mph (56.33 km/h)37.36 mph (60.13 km/h)
40 mph (64.37 km/h)42.7 mph (68.72 km/h)
45 mph (72.42 km/h)48.04 mph (77.31 km/h)
50 mph (80.47 km/h)53.37 mph (85.9 km/h)
55 mph (88.51 km/h)58.71 mph (94.49 km/h)
60 mph (96.56 km/h)64.05 mph (103.08 km/h)
65 mph (104.61 km/h)69.39 mph (111.67 km/h)
70 mph (112.65 km/h)74.72 mph (120.25 km/h)
75 mph (120.7 km/h)80.06 mph (128.84 km/h)
80 mph (128.75 km/h)85.4 mph (137.43 km/h)
85 mph (136.79 km/h)90.73 mph (146.02 km/h)
90 mph (144.84 km/h)96.07 mph (154.61 km/h)
95 mph (152.89 km/h)101.41 mph (163.2 km/h)
100 mph (160.93 km/h)106.75 mph (171.79 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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