Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
240/50r16 vs 240/70r16 Tire Comparison Side By Side
  240/50-16 240/70-16 Difference
Diameter inches (mm) 25.45 (646.4) 29.23 (742.4) 3.78 (96) 14.9%
Width inches (mm) 9.45 (240) 9.45 (240) 0 (0) 0%
Circum. inches (mm) 79.95 (2030.73) 91.82 (2332.32) 11.87 (301.59) 14.9%
Sidewall Height inches (mm) 4.72 (120) 6.61 (168) 1.89 (48) 40%
Revolutions per mile (km) 792.5 (492.43) 690.02 (428.76) -102.48 (-63.68) -12.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.97 mph (36.97 km/h)
25 mph (40.23 km/h)28.71 mph (46.21 km/h)
30 mph (48.28 km/h)34.46 mph (55.45 km/h)
35 mph (56.33 km/h)40.2 mph (64.69 km/h)
40 mph (64.37 km/h)45.94 mph (73.93 km/h)
45 mph (72.42 km/h)51.68 mph (83.18 km/h)
50 mph (80.47 km/h)57.43 mph (92.42 km/h)
55 mph (88.51 km/h)63.17 mph (101.66 km/h)
60 mph (96.56 km/h)68.91 mph (110.9 km/h)
65 mph (104.61 km/h)74.65 mph (120.14 km/h)
70 mph (112.65 km/h)80.4 mph (129.39 km/h)
75 mph (120.7 km/h)86.14 mph (138.63 km/h)
80 mph (128.75 km/h)91.88 mph (147.87 km/h)
85 mph (136.79 km/h)97.62 mph (157.11 km/h)
90 mph (144.84 km/h)103.37 mph (166.35 km/h)
95 mph (152.89 km/h)109.11 mph (175.59 km/h)
100 mph (160.93 km/h)114.85 mph (184.84 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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