Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/35r19 vs 275/35r19 Tire Comparison Side By Side
  285/35-19 275/35-19 Difference
Diameter inches (mm) 26.85 (682.1) 26.58 (675.1) -0.28 (-7) -1%
Width inches (mm) 11.22 (285) 10.83 (275) -0.39 (-10) -3.5%
Circum. inches (mm) 84.37 (2142.88) 83.5 (2120.89) -0.87 (-21.99) -1%
Sidewall Height inches (mm) 3.93 (99.75) 3.79 (96.25) -0.14 (-3.5) -3.5%
Revolutions per mile (km) 751.02 (466.66) 758.81 (471.5) 7.79 (4.84) 1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.79 mph (31.86 km/h)
25 mph (40.23 km/h)24.74 mph (39.82 km/h)
30 mph (48.28 km/h)29.69 mph (47.78 km/h)
35 mph (56.33 km/h)34.64 mph (55.75 km/h)
40 mph (64.37 km/h)39.59 mph (63.71 km/h)
45 mph (72.42 km/h)44.54 mph (71.68 km/h)
50 mph (80.47 km/h)49.49 mph (79.64 km/h)
55 mph (88.51 km/h)54.44 mph (87.61 km/h)
60 mph (96.56 km/h)59.38 mph (95.57 km/h)
65 mph (104.61 km/h)64.33 mph (103.53 km/h)
70 mph (112.65 km/h)69.28 mph (111.5 km/h)
75 mph (120.7 km/h)74.23 mph (119.46 km/h)
80 mph (128.75 km/h)79.18 mph (127.43 km/h)
85 mph (136.79 km/h)84.13 mph (135.39 km/h)
90 mph (144.84 km/h)89.08 mph (143.35 km/h)
95 mph (152.89 km/h)94.03 mph (151.32 km/h)
100 mph (160.93 km/h)98.97 mph (159.28 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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