Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
130/70r18 vs 150/60r17 Tire Comparison Side By Side
  130/70-18 150/60-17 Difference
Diameter inches (mm) 25.17 (639.2) 24.09 (611.8) -1.08 (-27.4) -4.3%
Width inches (mm) 5.12 (130) 5.91 (150) 0.79 (20) 15.4%
Circum. inches (mm) 79.06 (2008.11) 75.67 (1922.03) -3.39 (-86.08) -4.3%
Sidewall Height inches (mm) 3.58 (91) 3.54 (90) -0.04 (-1) -1.1%
Revolutions per mile (km) 801.42 (497.98) 837.32 (520.28) 35.89 (22.3) 4.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.14 mph (30.81 km/h)
25 mph (40.23 km/h)23.93 mph (38.51 km/h)
30 mph (48.28 km/h)28.71 mph (46.21 km/h)
35 mph (56.33 km/h)33.5 mph (53.91 km/h)
40 mph (64.37 km/h)38.29 mph (61.61 km/h)
45 mph (72.42 km/h)43.07 mph (69.32 km/h)
50 mph (80.47 km/h)47.86 mph (77.02 km/h)
55 mph (88.51 km/h)52.64 mph (84.72 km/h)
60 mph (96.56 km/h)57.43 mph (92.42 km/h)
65 mph (104.61 km/h)62.21 mph (100.12 km/h)
70 mph (112.65 km/h)67 mph (107.83 km/h)
75 mph (120.7 km/h)71.79 mph (115.53 km/h)
80 mph (128.75 km/h)76.57 mph (123.23 km/h)
85 mph (136.79 km/h)81.36 mph (130.93 km/h)
90 mph (144.84 km/h)86.14 mph (138.63 km/h)
95 mph (152.89 km/h)90.93 mph (146.33 km/h)
100 mph (160.93 km/h)95.71 mph (154.04 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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