Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/45r16 vs 265/75r16 Tire Comparison Side By Side
  275/45-16 265/75-16 Difference
Diameter inches (mm) 25.74 (653.9) 31.65 (803.9) 5.91 (150) 22.9%
Width inches (mm) 10.83 (275) 10.43 (265) -0.39 (-10) -3.6%
Circum. inches (mm) 80.88 (2054.29) 99.43 (2525.53) 18.55 (471.24) 22.9%
Sidewall Height inches (mm) 4.87 (123.75) 7.82 (198.75) 2.95 (75) 60.6%
Revolutions per mile (km) 783.41 (486.79) 637.23 (395.96) -146.18 (-90.83) -18.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)24.59 mph (39.57 km/h)
25 mph (40.23 km/h)30.73 mph (49.46 km/h)
30 mph (48.28 km/h)36.88 mph (59.36 km/h)
35 mph (56.33 km/h)43.03 mph (69.25 km/h)
40 mph (64.37 km/h)49.18 mph (79.14 km/h)
45 mph (72.42 km/h)55.32 mph (89.03 km/h)
50 mph (80.47 km/h)61.47 mph (98.93 km/h)
55 mph (88.51 km/h)67.62 mph (108.82 km/h)
60 mph (96.56 km/h)73.76 mph (118.71 km/h)
65 mph (104.61 km/h)79.91 mph (128.6 km/h)
70 mph (112.65 km/h)86.06 mph (138.5 km/h)
75 mph (120.7 km/h)92.2 mph (148.39 km/h)
80 mph (128.75 km/h)98.35 mph (158.28 km/h)
85 mph (136.79 km/h)104.5 mph (168.17 km/h)
90 mph (144.84 km/h)110.65 mph (178.07 km/h)
95 mph (152.89 km/h)116.79 mph (187.96 km/h)
100 mph (160.93 km/h)122.94 mph (197.85 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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