Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
120/60r17 vs 130/70r17 Tire Comparison Side By Side
  120/60-17 130/70-17 Difference
Diameter inches (mm) 22.67 (575.8) 24.17 (613.8) 1.5 (38) 6.6%
Width inches (mm) 4.72 (120) 5.12 (130) 0.39 (10) 8.3%
Circum. inches (mm) 71.22 (1808.93) 75.92 (1928.31) 4.7 (119.38) 6.6%
Sidewall Height inches (mm) 2.83 (72) 3.58 (91) 0.75 (19) 26.4%
Revolutions per mile (km) 889.67 (552.81) 834.59 (518.59) -55.08 (-34.22) -6.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.32 mph (34.31 km/h)
25 mph (40.23 km/h)26.65 mph (42.89 km/h)
30 mph (48.28 km/h)31.98 mph (51.47 km/h)
35 mph (56.33 km/h)37.31 mph (60.04 km/h)
40 mph (64.37 km/h)42.64 mph (68.62 km/h)
45 mph (72.42 km/h)47.97 mph (77.2 km/h)
50 mph (80.47 km/h)53.3 mph (85.78 km/h)
55 mph (88.51 km/h)58.63 mph (94.36 km/h)
60 mph (96.56 km/h)63.96 mph (102.93 km/h)
65 mph (104.61 km/h)69.29 mph (111.51 km/h)
70 mph (112.65 km/h)74.62 mph (120.09 km/h)
75 mph (120.7 km/h)79.95 mph (128.67 km/h)
80 mph (128.75 km/h)85.28 mph (137.24 km/h)
85 mph (136.79 km/h)90.61 mph (145.82 km/h)
90 mph (144.84 km/h)95.94 mph (154.4 km/h)
95 mph (152.89 km/h)101.27 mph (162.98 km/h)
100 mph (160.93 km/h)106.6 mph (171.56 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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