Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
220/60r16 vs 225/20r16 Tire Comparison Side By Side
  220/60-16 225/20-16 Difference
Diameter inches (mm) 26.39 (670.4) 19.54 (496.4) -6.85 (-174) -26%
Width inches (mm) 8.66 (220) 8.86 (225) 0.2 (5) 2.3%
Circum. inches (mm) 82.92 (2106.12) 61.4 (1559.49) -21.52 (-546.64) -26%
Sidewall Height inches (mm) 5.2 (132) 1.77 (45) -3.43 (-87) -65.9%
Revolutions per mile (km) 764.13 (474.81) 1031.97 (641.24) 267.84 (166.43) 35.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)14.81 mph (23.83 km/h)
25 mph (40.23 km/h)18.51 mph (29.79 km/h)
30 mph (48.28 km/h)22.21 mph (35.75 km/h)
35 mph (56.33 km/h)25.92 mph (41.71 km/h)
40 mph (64.37 km/h)29.62 mph (47.67 km/h)
45 mph (72.42 km/h)33.32 mph (53.62 km/h)
50 mph (80.47 km/h)37.02 mph (59.58 km/h)
55 mph (88.51 km/h)40.72 mph (65.54 km/h)
60 mph (96.56 km/h)44.43 mph (71.5 km/h)
65 mph (104.61 km/h)48.13 mph (77.46 km/h)
70 mph (112.65 km/h)51.83 mph (83.42 km/h)
75 mph (120.7 km/h)55.53 mph (89.37 km/h)
80 mph (128.75 km/h)59.24 mph (95.33 km/h)
85 mph (136.79 km/h)62.94 mph (101.29 km/h)
90 mph (144.84 km/h)66.64 mph (107.25 km/h)
95 mph (152.89 km/h)70.34 mph (113.21 km/h)
100 mph (160.93 km/h)74.05 mph (119.16 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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