Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/45r10 vs 225/70r10 Tire Comparison Side By Side
  225/45-10 225/70-10 Difference
Diameter inches (mm) 17.97 (456.5) 22.4 (569) 4.43 (112.5) 24.6%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 56.46 (1434.14) 70.38 (1787.57) 13.91 (353.43) 24.6%
Sidewall Height inches (mm) 3.99 (101.25) 6.2 (157.5) 2.21 (56.25) 55.6%
Revolutions per mile (km) 1122.17 (697.28) 900.3 (559.42) -221.87 (-137.86) -19.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)24.93 mph (40.12 km/h)
25 mph (40.23 km/h)31.16 mph (50.15 km/h)
30 mph (48.28 km/h)37.39 mph (60.18 km/h)
35 mph (56.33 km/h)43.63 mph (70.21 km/h)
40 mph (64.37 km/h)49.86 mph (80.24 km/h)
45 mph (72.42 km/h)56.09 mph (90.27 km/h)
50 mph (80.47 km/h)62.32 mph (100.3 km/h)
55 mph (88.51 km/h)68.55 mph (110.33 km/h)
60 mph (96.56 km/h)74.79 mph (120.36 km/h)
65 mph (104.61 km/h)81.02 mph (130.39 km/h)
70 mph (112.65 km/h)87.25 mph (140.42 km/h)
75 mph (120.7 km/h)93.48 mph (150.45 km/h)
80 mph (128.75 km/h)99.72 mph (160.48 km/h)
85 mph (136.79 km/h)105.95 mph (170.51 km/h)
90 mph (144.84 km/h)112.18 mph (180.54 km/h)
95 mph (152.89 km/h)118.41 mph (190.57 km/h)
100 mph (160.93 km/h)124.64 mph (200.6 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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