Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
24/8r12 vs 130/60r13 Tire Comparison Side By Side
  24/8-12 130/60-13 Difference
Diameter inches (mm) 23.99 (609.3) 19.14 (486.2) -4.85 (-123.1) -20.2%
Width inches (mm) 7.99 (203) 5.12 (130) -2.87 (-73) -36%
Circum. inches (mm) 75.36 (1914.17) 60.14 (1527.44) -15.23 (-386.73) -20.2%
Sidewall Height inches (mm) 5.99 (152.25) 3.07 (78) -2.92 (-74.25) -48.8%
Revolutions per mile (km) 840.75 (522.42) 1053.62 (654.69) 212.87 (132.27) 25.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)15.96 mph (25.68 km/h)
25 mph (40.23 km/h)19.95 mph (32.11 km/h)
30 mph (48.28 km/h)23.94 mph (38.53 km/h)
35 mph (56.33 km/h)27.93 mph (44.95 km/h)
40 mph (64.37 km/h)31.92 mph (51.37 km/h)
45 mph (72.42 km/h)35.91 mph (57.79 km/h)
50 mph (80.47 km/h)39.9 mph (64.21 km/h)
55 mph (88.51 km/h)43.89 mph (70.63 km/h)
60 mph (96.56 km/h)47.88 mph (77.05 km/h)
65 mph (104.61 km/h)51.87 mph (83.47 km/h)
70 mph (112.65 km/h)55.86 mph (89.89 km/h)
75 mph (120.7 km/h)59.85 mph (96.32 km/h)
80 mph (128.75 km/h)63.84 mph (102.74 km/h)
85 mph (136.79 km/h)67.83 mph (109.16 km/h)
90 mph (144.84 km/h)71.82 mph (115.58 km/h)
95 mph (152.89 km/h)75.81 mph (122 km/h)
100 mph (160.93 km/h)79.8 mph (128.42 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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