Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
130/70r13 vs 140/70r13 Tire Comparison Side By Side
  130/70-13 140/70-13 Difference
Diameter inches (mm) 20.17 (512.2) 20.72 (526.2) 0.55 (14) 2.7%
Width inches (mm) 5.12 (130) 5.51 (140) 0.39 (10) 7.7%
Circum. inches (mm) 63.35 (1609.12) 65.08 (1653.11) 1.73 (43.98) 2.7%
Sidewall Height inches (mm) 3.58 (91) 3.86 (98) 0.28 (7) 7.7%
Revolutions per mile (km) 1000.14 (621.46) 973.53 (604.92) -26.61 (-16.53) -2.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.55 mph (33.07 km/h)
25 mph (40.23 km/h)25.68 mph (41.33 km/h)
30 mph (48.28 km/h)30.82 mph (49.6 km/h)
35 mph (56.33 km/h)35.96 mph (57.87 km/h)
40 mph (64.37 km/h)41.09 mph (66.13 km/h)
45 mph (72.42 km/h)46.23 mph (74.4 km/h)
50 mph (80.47 km/h)51.37 mph (82.67 km/h)
55 mph (88.51 km/h)56.5 mph (90.93 km/h)
60 mph (96.56 km/h)61.64 mph (99.2 km/h)
65 mph (104.61 km/h)66.78 mph (107.47 km/h)
70 mph (112.65 km/h)71.91 mph (115.73 km/h)
75 mph (120.7 km/h)77.05 mph (124 km/h)
80 mph (128.75 km/h)82.19 mph (132.27 km/h)
85 mph (136.79 km/h)87.32 mph (140.53 km/h)
90 mph (144.84 km/h)92.46 mph (148.8 km/h)
95 mph (152.89 km/h)97.6 mph (157.07 km/h)
100 mph (160.93 km/h)102.73 mph (165.33 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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