Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/80r22.5 vs 255/80r22.5 Tire Comparison Side By Side
  275/80-22.5 255/80-22.5 Difference
Diameter inches (mm) 39.82 (1011.5) 38.56 (979.5) -1.26 (-32) -3.2%
Width inches (mm) 10.83 (275) 10.04 (255) -0.79 (-20) -7.3%
Circum. inches (mm) 125.11 (3177.72) 121.15 (3077.19) -3.96 (-100.53) -3.2%
Sidewall Height inches (mm) 8.66 (220) 8.03 (204) -0.63 (-16) -7.3%
Revolutions per mile (km) 506.45 (314.69) 522.99 (324.97) 16.55 (10.28) 3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.37 mph (31.17 km/h)
25 mph (40.23 km/h)24.21 mph (38.96 km/h)
30 mph (48.28 km/h)29.05 mph (46.75 km/h)
35 mph (56.33 km/h)33.89 mph (54.55 km/h)
40 mph (64.37 km/h)38.73 mph (62.34 km/h)
45 mph (72.42 km/h)43.58 mph (70.13 km/h)
50 mph (80.47 km/h)48.42 mph (77.92 km/h)
55 mph (88.51 km/h)53.26 mph (85.71 km/h)
60 mph (96.56 km/h)58.1 mph (93.51 km/h)
65 mph (104.61 km/h)62.94 mph (101.3 km/h)
70 mph (112.65 km/h)67.79 mph (109.09 km/h)
75 mph (120.7 km/h)72.63 mph (116.88 km/h)
80 mph (128.75 km/h)77.47 mph (124.67 km/h)
85 mph (136.79 km/h)82.31 mph (132.47 km/h)
90 mph (144.84 km/h)87.15 mph (140.26 km/h)
95 mph (152.89 km/h)91.99 mph (148.05 km/h)
100 mph (160.93 km/h)96.84 mph (155.84 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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