Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/40r22 vs 275/50r20 Tire Comparison Side By Side
  275/40-22 275/50-20 Difference
Diameter inches (mm) 30.66 (778.8) 30.83 (783) 0.17 (4.2) 0.5%
Width inches (mm) 10.83 (275) 10.83 (275) 0 (0) 0%
Circum. inches (mm) 96.33 (2446.67) 96.85 (2459.87) 0.52 (13.19) 0.5%
Sidewall Height inches (mm) 4.33 (110) 5.41 (137.5) 1.08 (27.5) 25%
Revolutions per mile (km) 657.77 (408.72) 654.24 (406.53) -3.53 (-2.19) -0.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.11 mph (32.36 km/h)
25 mph (40.23 km/h)25.13 mph (40.45 km/h)
30 mph (48.28 km/h)30.16 mph (48.54 km/h)
35 mph (56.33 km/h)35.19 mph (56.63 km/h)
40 mph (64.37 km/h)40.22 mph (64.72 km/h)
45 mph (72.42 km/h)45.24 mph (72.81 km/h)
50 mph (80.47 km/h)50.27 mph (80.9 km/h)
55 mph (88.51 km/h)55.3 mph (88.99 km/h)
60 mph (96.56 km/h)60.32 mph (97.08 km/h)
65 mph (104.61 km/h)65.35 mph (105.17 km/h)
70 mph (112.65 km/h)70.38 mph (113.26 km/h)
75 mph (120.7 km/h)75.4 mph (121.35 km/h)
80 mph (128.75 km/h)80.43 mph (129.44 km/h)
85 mph (136.79 km/h)85.46 mph (137.53 km/h)
90 mph (144.84 km/h)90.49 mph (145.62 km/h)
95 mph (152.89 km/h)95.51 mph (153.71 km/h)
100 mph (160.93 km/h)100.54 mph (161.8 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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