Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/30r19 vs 275/35r19 Tire Comparison Side By Side
  265/30-19 275/35-19 Difference
Diameter inches (mm) 25.26 (641.6) 26.58 (675.1) 1.32 (33.5) 5.2%
Width inches (mm) 10.43 (265) 10.83 (275) 0.39 (10) 3.8%
Circum. inches (mm) 79.36 (2015.65) 83.5 (2120.89) 4.14 (105.24) 5.2%
Sidewall Height inches (mm) 3.13 (79.5) 3.79 (96.25) 0.66 (16.75) 21.1%
Revolutions per mile (km) 798.43 (496.12) 758.81 (471.5) -39.62 (-24.62) -5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.04 mph (33.87 km/h)
25 mph (40.23 km/h)26.31 mph (42.33 km/h)
30 mph (48.28 km/h)31.57 mph (50.8 km/h)
35 mph (56.33 km/h)36.83 mph (59.27 km/h)
40 mph (64.37 km/h)42.09 mph (67.74 km/h)
45 mph (72.42 km/h)47.35 mph (76.2 km/h)
50 mph (80.47 km/h)52.61 mph (84.67 km/h)
55 mph (88.51 km/h)57.87 mph (93.14 km/h)
60 mph (96.56 km/h)63.13 mph (101.6 km/h)
65 mph (104.61 km/h)68.39 mph (110.07 km/h)
70 mph (112.65 km/h)73.65 mph (118.54 km/h)
75 mph (120.7 km/h)78.92 mph (127 km/h)
80 mph (128.75 km/h)84.18 mph (135.47 km/h)
85 mph (136.79 km/h)89.44 mph (143.94 km/h)
90 mph (144.84 km/h)94.7 mph (152.4 km/h)
95 mph (152.89 km/h)99.96 mph (160.87 km/h)
100 mph (160.93 km/h)105.22 mph (169.34 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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