Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
130/70r16 vs 130/90r18 Tire Comparison Side By Side
  130/70-16 130/90-18 Difference
Diameter inches (mm) 23.17 (588.4) 27.21 (691.2) 4.05 (102.8) 17.5%
Width inches (mm) 5.12 (130) 5.12 (130) 0 (0) 0%
Circum. inches (mm) 72.78 (1848.51) 85.49 (2171.47) 12.71 (322.96) 17.5%
Sidewall Height inches (mm) 3.58 (91) 4.61 (117) 1.02 (26) 28.6%
Revolutions per mile (km) 870.62 (540.97) 741.13 (460.52) -129.48 (-80.46) -14.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.49 mph (37.81 km/h)
25 mph (40.23 km/h)29.37 mph (47.26 km/h)
30 mph (48.28 km/h)35.24 mph (56.72 km/h)
35 mph (56.33 km/h)41.11 mph (66.17 km/h)
40 mph (64.37 km/h)46.99 mph (75.62 km/h)
45 mph (72.42 km/h)52.86 mph (85.07 km/h)
50 mph (80.47 km/h)58.74 mph (94.53 km/h)
55 mph (88.51 km/h)64.61 mph (103.98 km/h)
60 mph (96.56 km/h)70.48 mph (113.43 km/h)
65 mph (104.61 km/h)76.36 mph (122.88 km/h)
70 mph (112.65 km/h)82.23 mph (132.34 km/h)
75 mph (120.7 km/h)88.1 mph (141.79 km/h)
80 mph (128.75 km/h)93.98 mph (151.24 km/h)
85 mph (136.79 km/h)99.85 mph (160.69 km/h)
90 mph (144.84 km/h)105.72 mph (170.15 km/h)
95 mph (152.89 km/h)111.6 mph (179.6 km/h)
100 mph (160.93 km/h)117.47 mph (189.05 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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