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 160/70r10 Tire Comparison Side By Side
  225/45-10 160/70-10 Difference
Diameter inches (mm) 17.97 (456.5) 18.82 (478) 0.85 (21.5) 4.7%
Width inches (mm) 8.86 (225) 6.3 (160) -2.56 (-65) -28.9%
Circum. inches (mm) 56.46 (1434.14) 59.12 (1501.68) 2.66 (67.54) 4.7%
Sidewall Height inches (mm) 3.99 (101.25) 4.41 (112) 0.42 (10.75) 10.6%
Revolutions per mile (km) 1122.17 (697.28) 1071.69 (665.92) -50.47 (-31.36) -4.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.94 mph (33.7 km/h)
25 mph (40.23 km/h)26.18 mph (42.13 km/h)
30 mph (48.28 km/h)31.41 mph (50.55 km/h)
35 mph (56.33 km/h)36.65 mph (58.98 km/h)
40 mph (64.37 km/h)41.88 mph (67.41 km/h)
45 mph (72.42 km/h)47.12 mph (75.83 km/h)
50 mph (80.47 km/h)52.35 mph (84.26 km/h)
55 mph (88.51 km/h)57.59 mph (92.68 km/h)
60 mph (96.56 km/h)62.83 mph (101.11 km/h)
65 mph (104.61 km/h)68.06 mph (109.53 km/h)
70 mph (112.65 km/h)73.3 mph (117.96 km/h)
75 mph (120.7 km/h)78.53 mph (126.39 km/h)
80 mph (128.75 km/h)83.77 mph (134.81 km/h)
85 mph (136.79 km/h)89 mph (143.24 km/h)
90 mph (144.84 km/h)94.24 mph (151.66 km/h)
95 mph (152.89 km/h)99.47 mph (160.09 km/h)
100 mph (160.93 km/h)104.71 mph (168.51 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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