Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/75r16 vs 205/60r15 Tire Comparison Side By Side
  245/75-16 205/60-15 Difference
Diameter inches (mm) 30.47 (773.9) 24.69 (627) -5.78 (-146.9) -19%
Width inches (mm) 9.65 (245) 8.07 (205) -1.57 (-40) -16.3%
Circum. inches (mm) 95.72 (2431.28) 77.55 (1969.78) -18.17 (-461.5) -19%
Sidewall Height inches (mm) 7.23 (183.75) 4.84 (123) -2.39 (-60.75) -33.1%
Revolutions per mile (km) 661.93 (411.31) 817.02 (507.67) 155.08 (96.36) 23.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)16.2 mph (26.08 km/h)
25 mph (40.23 km/h)20.25 mph (32.6 km/h)
30 mph (48.28 km/h)24.31 mph (39.12 km/h)
35 mph (56.33 km/h)28.36 mph (45.64 km/h)
40 mph (64.37 km/h)32.41 mph (52.15 km/h)
45 mph (72.42 km/h)36.46 mph (58.67 km/h)
50 mph (80.47 km/h)40.51 mph (65.19 km/h)
55 mph (88.51 km/h)44.56 mph (71.71 km/h)
60 mph (96.56 km/h)48.61 mph (78.23 km/h)
65 mph (104.61 km/h)52.66 mph (84.75 km/h)
70 mph (112.65 km/h)56.71 mph (91.27 km/h)
75 mph (120.7 km/h)60.76 mph (97.79 km/h)
80 mph (128.75 km/h)64.81 mph (104.31 km/h)
85 mph (136.79 km/h)68.87 mph (110.83 km/h)
90 mph (144.84 km/h)72.92 mph (117.35 km/h)
95 mph (152.89 km/h)76.97 mph (123.87 km/h)
100 mph (160.93 km/h)81.02 mph (130.39 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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