Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
130/80r15 vs 130/90r15 Tire Comparison Side By Side
  130/80-15 130/90-15 Difference
Diameter inches (mm) 23.19 (589) 24.21 (615) 1.02 (26) 4.4%
Width inches (mm) 5.12 (130) 5.12 (130) 0 (0) 0%
Circum. inches (mm) 72.85 (1850.4) 76.07 (1932.08) 3.22 (81.68) 4.4%
Sidewall Height inches (mm) 4.09 (104) 4.61 (117) 0.51 (13) 12.5%
Revolutions per mile (km) 869.73 (540.42) 832.96 (517.58) -36.77 (-22.85) -4.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.88 mph (33.61 km/h)
25 mph (40.23 km/h)26.1 mph (42.01 km/h)
30 mph (48.28 km/h)31.32 mph (50.41 km/h)
35 mph (56.33 km/h)36.54 mph (58.81 km/h)
40 mph (64.37 km/h)41.77 mph (67.22 km/h)
45 mph (72.42 km/h)46.99 mph (75.62 km/h)
50 mph (80.47 km/h)52.21 mph (84.02 km/h)
55 mph (88.51 km/h)57.43 mph (92.42 km/h)
60 mph (96.56 km/h)62.65 mph (100.82 km/h)
65 mph (104.61 km/h)67.87 mph (109.23 km/h)
70 mph (112.65 km/h)73.09 mph (117.63 km/h)
75 mph (120.7 km/h)78.31 mph (126.03 km/h)
80 mph (128.75 km/h)83.53 mph (134.43 km/h)
85 mph (136.79 km/h)88.75 mph (142.83 km/h)
90 mph (144.84 km/h)93.97 mph (151.23 km/h)
95 mph (152.89 km/h)99.19 mph (159.64 km/h)
100 mph (160.93 km/h)104.41 mph (168.04 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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