Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/75r16 vs 285/75r16 Tire Comparison Side By Side
  265/75-16 285/75-16 Difference
Diameter inches (mm) 31.65 (803.9) 32.83 (833.9) 1.18 (30) 3.7%
Width inches (mm) 10.43 (265) 11.22 (285) 0.79 (20) 7.5%
Circum. inches (mm) 99.43 (2525.53) 103.14 (2619.77) 3.71 (94.25) 3.7%
Sidewall Height inches (mm) 7.82 (198.75) 8.42 (213.75) 0.59 (15) 7.5%
Revolutions per mile (km) 637.23 (395.96) 614.31 (381.71) -22.92 (-14.24) -3.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.75 mph (33.39 km/h)
25 mph (40.23 km/h)25.93 mph (41.74 km/h)
30 mph (48.28 km/h)31.12 mph (50.08 km/h)
35 mph (56.33 km/h)36.31 mph (58.43 km/h)
40 mph (64.37 km/h)41.49 mph (66.78 km/h)
45 mph (72.42 km/h)46.68 mph (75.12 km/h)
50 mph (80.47 km/h)51.87 mph (83.47 km/h)
55 mph (88.51 km/h)57.05 mph (91.82 km/h)
60 mph (96.56 km/h)62.24 mph (100.16 km/h)
65 mph (104.61 km/h)67.43 mph (108.51 km/h)
70 mph (112.65 km/h)72.61 mph (116.86 km/h)
75 mph (120.7 km/h)77.8 mph (125.21 km/h)
80 mph (128.75 km/h)82.99 mph (133.55 km/h)
85 mph (136.79 km/h)88.17 mph (141.9 km/h)
90 mph (144.84 km/h)93.36 mph (150.25 km/h)
95 mph (152.89 km/h)98.55 mph (158.59 km/h)
100 mph (160.93 km/h)103.73 mph (166.94 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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