Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/55r19 vs 265/70r18 Tire Comparison Side By Side
  275/55-19 265/70-18 Difference
Diameter inches (mm) 30.91 (785.1) 32.61 (828.2) 1.7 (43.1) 5.5%
Width inches (mm) 10.83 (275) 10.43 (265) -0.39 (-10) -3.6%
Circum. inches (mm) 97.1 (2466.46) 102.44 (2601.87) 5.33 (135.4) 5.5%
Sidewall Height inches (mm) 5.95 (151.25) 7.3 (185.5) 1.35 (34.25) 22.6%
Revolutions per mile (km) 652.49 (405.44) 618.53 (384.34) -33.96 (-21.1) -5.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.1 mph (33.95 km/h)
25 mph (40.23 km/h)26.37 mph (42.44 km/h)
30 mph (48.28 km/h)31.65 mph (50.93 km/h)
35 mph (56.33 km/h)36.92 mph (59.42 km/h)
40 mph (64.37 km/h)42.2 mph (67.91 km/h)
45 mph (72.42 km/h)47.47 mph (76.4 km/h)
50 mph (80.47 km/h)52.74 mph (84.88 km/h)
55 mph (88.51 km/h)58.02 mph (93.37 km/h)
60 mph (96.56 km/h)63.29 mph (101.86 km/h)
65 mph (104.61 km/h)68.57 mph (110.35 km/h)
70 mph (112.65 km/h)73.84 mph (118.84 km/h)
75 mph (120.7 km/h)79.12 mph (127.33 km/h)
80 mph (128.75 km/h)84.39 mph (135.82 km/h)
85 mph (136.79 km/h)89.67 mph (144.3 km/h)
90 mph (144.84 km/h)94.94 mph (152.79 km/h)
95 mph (152.89 km/h)100.22 mph (161.28 km/h)
100 mph (160.93 km/h)105.49 mph (169.77 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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