Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/60r16 vs 285/60r16 Tire Comparison Side By Side
  255/60-16 285/60-16 Difference
Diameter inches (mm) 28.05 (712.4) 29.46 (748.4) 1.42 (36) 5.1%
Width inches (mm) 10.04 (255) 11.22 (285) 1.18 (30) 11.8%
Circum. inches (mm) 88.11 (2238.07) 92.57 (2351.17) 4.45 (113.1) 5.1%
Sidewall Height inches (mm) 6.02 (153) 6.73 (171) 0.71 (18) 11.8%
Revolutions per mile (km) 719.08 (446.81) 684.49 (425.32) -34.59 (-21.49) -4.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.01 mph (33.81 km/h)
25 mph (40.23 km/h)26.26 mph (42.27 km/h)
30 mph (48.28 km/h)31.52 mph (50.72 km/h)
35 mph (56.33 km/h)36.77 mph (59.17 km/h)
40 mph (64.37 km/h)42.02 mph (67.63 km/h)
45 mph (72.42 km/h)47.27 mph (76.08 km/h)
50 mph (80.47 km/h)52.53 mph (84.53 km/h)
55 mph (88.51 km/h)57.78 mph (92.99 km/h)
60 mph (96.56 km/h)63.03 mph (101.44 km/h)
65 mph (104.61 km/h)68.28 mph (109.89 km/h)
70 mph (112.65 km/h)73.54 mph (118.35 km/h)
75 mph (120.7 km/h)78.79 mph (126.8 km/h)
80 mph (128.75 km/h)84.04 mph (135.25 km/h)
85 mph (136.79 km/h)89.3 mph (143.71 km/h)
90 mph (144.84 km/h)94.55 mph (152.16 km/h)
95 mph (152.89 km/h)99.8 mph (160.61 km/h)
100 mph (160.93 km/h)105.05 mph (169.07 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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