Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/40r17 vs 285/35r19 Tire Comparison Side By Side
  275/40-17 285/35-19 Difference
Diameter inches (mm) 25.66 (651.8) 26.85 (682.1) 1.19 (30.3) 4.6%
Width inches (mm) 10.83 (275) 11.22 (285) 0.39 (10) 3.6%
Circum. inches (mm) 80.62 (2047.69) 84.37 (2142.88) 3.75 (95.19) 4.6%
Sidewall Height inches (mm) 4.33 (110) 3.93 (99.75) -0.4 (-10.25) -9.3%
Revolutions per mile (km) 785.93 (488.35) 751.02 (466.66) -34.91 (-21.69) -4.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.93 mph (33.68 km/h)
25 mph (40.23 km/h)26.16 mph (42.1 km/h)
30 mph (48.28 km/h)31.39 mph (50.52 km/h)
35 mph (56.33 km/h)36.63 mph (58.95 km/h)
40 mph (64.37 km/h)41.86 mph (67.37 km/h)
45 mph (72.42 km/h)47.09 mph (75.79 km/h)
50 mph (80.47 km/h)52.32 mph (84.21 km/h)
55 mph (88.51 km/h)57.56 mph (92.63 km/h)
60 mph (96.56 km/h)62.79 mph (101.05 km/h)
65 mph (104.61 km/h)68.02 mph (109.47 km/h)
70 mph (112.65 km/h)73.25 mph (117.89 km/h)
75 mph (120.7 km/h)78.49 mph (126.31 km/h)
80 mph (128.75 km/h)83.72 mph (134.73 km/h)
85 mph (136.79 km/h)88.95 mph (143.15 km/h)
90 mph (144.84 km/h)94.18 mph (151.57 km/h)
95 mph (152.89 km/h)99.42 mph (160 km/h)
100 mph (160.93 km/h)104.65 mph (168.42 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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