Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/45r22 vs 33/12.5r22 Tire Comparison Side By Side
  275/45-22 33/12.5-22 Difference
Diameter inches (mm) 31.74 (806.3) 33.02 (838.64) 1.27 (32.34) 4%
Width inches (mm) 10.83 (275) 12.52 (318) 1.69 (43) 15.6%
Circum. inches (mm) 99.73 (2533.07) 103.73 (2634.67) 4 (101.6) 4%
Sidewall Height inches (mm) 4.87 (123.75) 5.51 (139.92) 0.64 (16.17) 13.1%
Revolutions per mile (km) 635.33 (394.78) 610.83 (379.55) -24.5 (-15.22) -3.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.8 mph (33.48 km/h)
25 mph (40.23 km/h)26 mph (41.85 km/h)
30 mph (48.28 km/h)31.2 mph (50.22 km/h)
35 mph (56.33 km/h)36.4 mph (58.59 km/h)
40 mph (64.37 km/h)41.6 mph (66.96 km/h)
45 mph (72.42 km/h)46.8 mph (75.33 km/h)
50 mph (80.47 km/h)52.01 mph (83.69 km/h)
55 mph (88.51 km/h)57.21 mph (92.06 km/h)
60 mph (96.56 km/h)62.41 mph (100.43 km/h)
65 mph (104.61 km/h)67.61 mph (108.8 km/h)
70 mph (112.65 km/h)72.81 mph (117.17 km/h)
75 mph (120.7 km/h)78.01 mph (125.54 km/h)
80 mph (128.75 km/h)83.21 mph (133.91 km/h)
85 mph (136.79 km/h)88.41 mph (142.28 km/h)
90 mph (144.84 km/h)93.61 mph (150.65 km/h)
95 mph (152.89 km/h)98.81 mph (159.02 km/h)
100 mph (160.93 km/h)104.01 mph (167.39 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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