Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/40r17 vs 275/35r18 Tire Comparison Side By Side
  265/40-17 275/35-18 Difference
Diameter inches (mm) 25.35 (643.8) 25.58 (649.7) 0.23 (5.9) 0.9%
Width inches (mm) 10.43 (265) 10.83 (275) 0.39 (10) 3.8%
Circum. inches (mm) 79.63 (2022.56) 80.36 (2041.09) 0.73 (18.54) 0.9%
Sidewall Height inches (mm) 4.17 (106) 3.79 (96.25) -0.38 (-9.75) -9.2%
Revolutions per mile (km) 795.7 (494.42) 788.47 (489.93) -7.23 (-4.49) -0.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.18 mph (32.48 km/h)
25 mph (40.23 km/h)25.23 mph (40.6 km/h)
30 mph (48.28 km/h)30.27 mph (48.72 km/h)
35 mph (56.33 km/h)35.32 mph (56.84 km/h)
40 mph (64.37 km/h)40.37 mph (64.96 km/h)
45 mph (72.42 km/h)45.41 mph (73.08 km/h)
50 mph (80.47 km/h)50.46 mph (81.2 km/h)
55 mph (88.51 km/h)55.5 mph (89.33 km/h)
60 mph (96.56 km/h)60.55 mph (97.45 km/h)
65 mph (104.61 km/h)65.6 mph (105.57 km/h)
70 mph (112.65 km/h)70.64 mph (113.69 km/h)
75 mph (120.7 km/h)75.69 mph (121.81 km/h)
80 mph (128.75 km/h)80.73 mph (129.93 km/h)
85 mph (136.79 km/h)85.78 mph (138.05 km/h)
90 mph (144.84 km/h)90.82 mph (146.17 km/h)
95 mph (152.89 km/h)95.87 mph (154.29 km/h)
100 mph (160.93 km/h)100.92 mph (162.41 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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