Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
130/60r13 vs 120/70r13 Tire Comparison Side By Side
  130/60-13 120/70-13 Difference
Diameter inches (mm) 19.14 (486.2) 19.61 (498.2) 0.47 (12) 2.5%
Width inches (mm) 5.12 (130) 4.72 (120) -0.39 (-10) -7.7%
Circum. inches (mm) 60.14 (1527.44) 61.62 (1565.14) 1.48 (37.7) 2.5%
Sidewall Height inches (mm) 3.07 (78) 3.31 (84) 0.24 (6) 7.7%
Revolutions per mile (km) 1053.62 (654.69) 1028.24 (638.92) -25.38 (-15.77) -2.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.49 mph (32.98 km/h)
25 mph (40.23 km/h)25.62 mph (41.23 km/h)
30 mph (48.28 km/h)30.74 mph (49.47 km/h)
35 mph (56.33 km/h)35.86 mph (57.72 km/h)
40 mph (64.37 km/h)40.99 mph (65.96 km/h)
45 mph (72.42 km/h)46.11 mph (74.21 km/h)
50 mph (80.47 km/h)51.23 mph (82.45 km/h)
55 mph (88.51 km/h)56.36 mph (90.7 km/h)
60 mph (96.56 km/h)61.48 mph (98.94 km/h)
65 mph (104.61 km/h)66.6 mph (107.19 km/h)
70 mph (112.65 km/h)71.73 mph (115.43 km/h)
75 mph (120.7 km/h)76.85 mph (123.68 km/h)
80 mph (128.75 km/h)81.97 mph (131.93 km/h)
85 mph (136.79 km/h)87.1 mph (140.17 km/h)
90 mph (144.84 km/h)92.22 mph (148.42 km/h)
95 mph (152.89 km/h)97.34 mph (156.66 km/h)
100 mph (160.93 km/h)102.47 mph (164.91 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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