Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
145/80r10 vs 130/60r10 Tire Comparison Side By Side
  145/80-10 130/60-10 Difference
Diameter inches (mm) 19.13 (486) 16.14 (410) -2.99 (-76) -15.6%
Width inches (mm) 5.71 (145) 5.12 (130) -0.59 (-15) -10.3%
Circum. inches (mm) 60.11 (1526.81) 50.71 (1288.05) -9.4 (-238.76) -15.6%
Sidewall Height inches (mm) 4.57 (116) 3.07 (78) -1.5 (-38) -32.8%
Revolutions per mile (km) 1054.05 (654.96) 1249.44 (776.36) 195.39 (121.41) 18.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)16.87 mph (27.15 km/h)
25 mph (40.23 km/h)21.09 mph (33.94 km/h)
30 mph (48.28 km/h)25.31 mph (40.73 km/h)
35 mph (56.33 km/h)29.53 mph (47.52 km/h)
40 mph (64.37 km/h)33.74 mph (54.31 km/h)
45 mph (72.42 km/h)37.96 mph (61.1 km/h)
50 mph (80.47 km/h)42.18 mph (67.88 km/h)
55 mph (88.51 km/h)46.4 mph (74.67 km/h)
60 mph (96.56 km/h)50.62 mph (81.46 km/h)
65 mph (104.61 km/h)54.84 mph (88.25 km/h)
70 mph (112.65 km/h)59.05 mph (95.04 km/h)
75 mph (120.7 km/h)63.27 mph (101.83 km/h)
80 mph (128.75 km/h)67.49 mph (108.61 km/h)
85 mph (136.79 km/h)71.71 mph (115.4 km/h)
90 mph (144.84 km/h)75.93 mph (122.19 km/h)
95 mph (152.89 km/h)80.14 mph (128.98 km/h)
100 mph (160.93 km/h)84.36 mph (135.77 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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