Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/30r21 vs 295/25r22 Tire Comparison Side By Side
  285/30-21 295/25-22 Difference
Diameter inches (mm) 27.73 (704.4) 27.81 (706.3) 0.07 (1.9) 0.3%
Width inches (mm) 11.22 (285) 11.61 (295) 0.39 (10) 3.5%
Circum. inches (mm) 87.12 (2212.94) 87.36 (2218.91) 0.24 (5.97) 0.3%
Sidewall Height inches (mm) 3.37 (85.5) 2.9 (73.75) -0.46 (-11.75) -13.7%
Revolutions per mile (km) 727.24 (451.89) 725.29 (450.67) -1.96 (-1.22) -0.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.05 mph (32.27 km/h)
25 mph (40.23 km/h)25.07 mph (40.34 km/h)
30 mph (48.28 km/h)30.08 mph (48.41 km/h)
35 mph (56.33 km/h)35.09 mph (56.48 km/h)
40 mph (64.37 km/h)40.11 mph (64.55 km/h)
45 mph (72.42 km/h)45.12 mph (72.62 km/h)
50 mph (80.47 km/h)50.13 mph (80.68 km/h)
55 mph (88.51 km/h)55.15 mph (88.75 km/h)
60 mph (96.56 km/h)60.16 mph (96.82 km/h)
65 mph (104.61 km/h)65.18 mph (104.89 km/h)
70 mph (112.65 km/h)70.19 mph (112.96 km/h)
75 mph (120.7 km/h)75.2 mph (121.03 km/h)
80 mph (128.75 km/h)80.22 mph (129.1 km/h)
85 mph (136.79 km/h)85.23 mph (137.16 km/h)
90 mph (144.84 km/h)90.24 mph (145.23 km/h)
95 mph (152.89 km/h)95.26 mph (153.3 km/h)
100 mph (160.93 km/h)100.27 mph (161.37 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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