Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/60r17 vs 275/70r17 Tire Comparison Side By Side
  285/60-17 275/70-17 Difference
Diameter inches (mm) 30.46 (773.8) 32.16 (816.8) 1.69 (43) 5.6%
Width inches (mm) 11.22 (285) 10.83 (275) -0.39 (-10) -3.5%
Circum. inches (mm) 95.71 (2430.96) 101.03 (2566.05) 5.32 (135.09) 5.6%
Sidewall Height inches (mm) 6.73 (171) 7.58 (192.5) 0.85 (21.5) 12.6%
Revolutions per mile (km) 662.02 (411.36) 627.17 (389.7) -34.85 (-21.66) -5.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.11 mph (33.98 km/h)
25 mph (40.23 km/h)26.39 mph (42.47 km/h)
30 mph (48.28 km/h)31.67 mph (50.96 km/h)
35 mph (56.33 km/h)36.94 mph (59.46 km/h)
40 mph (64.37 km/h)42.22 mph (67.95 km/h)
45 mph (72.42 km/h)47.5 mph (76.45 km/h)
50 mph (80.47 km/h)52.78 mph (84.94 km/h)
55 mph (88.51 km/h)58.06 mph (93.43 km/h)
60 mph (96.56 km/h)63.33 mph (101.93 km/h)
65 mph (104.61 km/h)68.61 mph (110.42 km/h)
70 mph (112.65 km/h)73.89 mph (118.91 km/h)
75 mph (120.7 km/h)79.17 mph (127.41 km/h)
80 mph (128.75 km/h)84.45 mph (135.9 km/h)
85 mph (136.79 km/h)89.72 mph (144.4 km/h)
90 mph (144.84 km/h)95 mph (152.89 km/h)
95 mph (152.89 km/h)100.28 mph (161.38 km/h)
100 mph (160.93 km/h)105.56 mph (169.88 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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