Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/60r14 vs 225/60r14 Tire Comparison Side By Side
  215/60-14 225/60-14 Difference
Diameter inches (mm) 24.16 (613.6) 24.63 (625.6) 0.47 (12) 2%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 75.89 (1927.68) 77.38 (1965.38) 1.48 (37.7) 2%
Sidewall Height inches (mm) 5.08 (129) 5.31 (135) 0.24 (6) 4.7%
Revolutions per mile (km) 834.86 (518.76) 818.85 (508.81) -16.01 (-9.95) -1.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.39 mph (32.82 km/h)
25 mph (40.23 km/h)25.49 mph (41.02 km/h)
30 mph (48.28 km/h)30.59 mph (49.22 km/h)
35 mph (56.33 km/h)35.68 mph (57.43 km/h)
40 mph (64.37 km/h)40.78 mph (65.63 km/h)
45 mph (72.42 km/h)45.88 mph (73.84 km/h)
50 mph (80.47 km/h)50.98 mph (82.04 km/h)
55 mph (88.51 km/h)56.08 mph (90.25 km/h)
60 mph (96.56 km/h)61.17 mph (98.45 km/h)
65 mph (104.61 km/h)66.27 mph (106.65 km/h)
70 mph (112.65 km/h)71.37 mph (114.86 km/h)
75 mph (120.7 km/h)76.47 mph (123.06 km/h)
80 mph (128.75 km/h)81.56 mph (131.27 km/h)
85 mph (136.79 km/h)86.66 mph (139.47 km/h)
90 mph (144.84 km/h)91.76 mph (147.67 km/h)
95 mph (152.89 km/h)96.86 mph (155.88 km/h)
100 mph (160.93 km/h)101.96 mph (164.08 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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