Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
130/90r18 vs 110/100r18 Tire Comparison Side By Side
  130/90-18 110/100-18 Difference
Diameter inches (mm) 27.21 (691.2) 26.66 (677.2) -0.55 (-14) -2%
Width inches (mm) 5.12 (130) 4.33 (110) -0.79 (-20) -15.4%
Circum. inches (mm) 85.49 (2171.47) 83.76 (2127.49) -1.73 (-43.98) -2%
Sidewall Height inches (mm) 4.61 (117) 4.33 (110) -0.28 (-7) -6%
Revolutions per mile (km) 741.13 (460.52) 756.45 (470.04) 15.32 (9.52) 2.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.59 mph (31.54 km/h)
25 mph (40.23 km/h)24.49 mph (39.42 km/h)
30 mph (48.28 km/h)29.39 mph (47.3 km/h)
35 mph (56.33 km/h)34.29 mph (55.19 km/h)
40 mph (64.37 km/h)39.19 mph (63.07 km/h)
45 mph (72.42 km/h)44.09 mph (70.95 km/h)
50 mph (80.47 km/h)48.99 mph (78.84 km/h)
55 mph (88.51 km/h)53.89 mph (86.72 km/h)
60 mph (96.56 km/h)58.78 mph (94.61 km/h)
65 mph (104.61 km/h)63.68 mph (102.49 km/h)
70 mph (112.65 km/h)68.58 mph (110.37 km/h)
75 mph (120.7 km/h)73.48 mph (118.26 km/h)
80 mph (128.75 km/h)78.38 mph (126.14 km/h)
85 mph (136.79 km/h)83.28 mph (134.02 km/h)
90 mph (144.84 km/h)88.18 mph (141.91 km/h)
95 mph (152.89 km/h)93.08 mph (149.79 km/h)
100 mph (160.93 km/h)97.97 mph (157.68 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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