Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
120/70r10 vs 110/90r10 Tire Comparison Side By Side
  120/70-10 110/90-10 Difference
Diameter inches (mm) 16.61 (422) 17.8 (452) 1.18 (30) 7.1%
Width inches (mm) 4.72 (120) 4.33 (110) -0.39 (-10) -8.3%
Circum. inches (mm) 52.19 (1325.75) 55.91 (1420) 3.71 (94.25) 7.1%
Sidewall Height inches (mm) 3.31 (84) 3.9 (99) 0.59 (15) 17.9%
Revolutions per mile (km) 1213.91 (754.29) 1133.34 (704.22) -80.57 (-50.06) -6.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.42 mph (34.48 km/h)
25 mph (40.23 km/h)26.78 mph (43.09 km/h)
30 mph (48.28 km/h)32.13 mph (51.71 km/h)
35 mph (56.33 km/h)37.49 mph (60.33 km/h)
40 mph (64.37 km/h)42.84 mph (68.95 km/h)
45 mph (72.42 km/h)48.2 mph (77.57 km/h)
50 mph (80.47 km/h)53.55 mph (86.19 km/h)
55 mph (88.51 km/h)58.91 mph (94.81 km/h)
60 mph (96.56 km/h)64.27 mph (103.43 km/h)
65 mph (104.61 km/h)69.62 mph (112.04 km/h)
70 mph (112.65 km/h)74.98 mph (120.66 km/h)
75 mph (120.7 km/h)80.33 mph (129.28 km/h)
80 mph (128.75 km/h)85.69 mph (137.9 km/h)
85 mph (136.79 km/h)91.04 mph (146.52 km/h)
90 mph (144.84 km/h)96.4 mph (155.14 km/h)
95 mph (152.89 km/h)101.75 mph (163.76 km/h)
100 mph (160.93 km/h)107.11 mph (172.38 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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