Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r17 vs 285/75r16 Tire Comparison Side By Side
  265/70-17 285/75-16 Difference
Diameter inches (mm) 31.61 (802.8) 32.83 (833.9) 1.22 (31.1) 3.9%
Width inches (mm) 10.43 (265) 11.22 (285) 0.79 (20) 7.5%
Circum. inches (mm) 99.29 (2522.07) 103.14 (2619.77) 3.85 (97.7) 3.9%
Sidewall Height inches (mm) 7.3 (185.5) 8.42 (213.75) 1.11 (28.25) 15.2%
Revolutions per mile (km) 638.1 (396.5) 614.31 (381.71) -23.8 (-14.79) -3.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.77 mph (33.43 km/h)
25 mph (40.23 km/h)25.97 mph (41.79 km/h)
30 mph (48.28 km/h)31.16 mph (50.15 km/h)
35 mph (56.33 km/h)36.36 mph (58.51 km/h)
40 mph (64.37 km/h)41.55 mph (66.87 km/h)
45 mph (72.42 km/h)46.74 mph (75.23 km/h)
50 mph (80.47 km/h)51.94 mph (83.58 km/h)
55 mph (88.51 km/h)57.13 mph (91.94 km/h)
60 mph (96.56 km/h)62.32 mph (100.3 km/h)
65 mph (104.61 km/h)67.52 mph (108.66 km/h)
70 mph (112.65 km/h)72.71 mph (117.02 km/h)
75 mph (120.7 km/h)77.91 mph (125.38 km/h)
80 mph (128.75 km/h)83.1 mph (133.74 km/h)
85 mph (136.79 km/h)88.29 mph (142.09 km/h)
90 mph (144.84 km/h)93.49 mph (150.45 km/h)
95 mph (152.89 km/h)98.68 mph (158.81 km/h)
100 mph (160.93 km/h)103.87 mph (167.17 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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