Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/50r14 vs 235/60r14 Tire Comparison Side By Side
  225/50-14 235/60-14 Difference
Diameter inches (mm) 22.86 (580.6) 25.1 (637.6) 2.24 (57) 9.8%
Width inches (mm) 8.86 (225) 9.25 (235) 0.39 (10) 4.4%
Circum. inches (mm) 71.81 (1824.01) 78.86 (2003.08) 7.05 (179.07) 9.8%
Sidewall Height inches (mm) 4.43 (112.5) 5.55 (141) 1.12 (28.5) 25.3%
Revolutions per mile (km) 882.31 (548.24) 803.43 (499.23) -78.88 (-49.01) -8.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.96 mph (35.35 km/h)
25 mph (40.23 km/h)27.45 mph (44.18 km/h)
30 mph (48.28 km/h)32.95 mph (53.02 km/h)
35 mph (56.33 km/h)38.44 mph (61.86 km/h)
40 mph (64.37 km/h)43.93 mph (70.69 km/h)
45 mph (72.42 km/h)49.42 mph (79.53 km/h)
50 mph (80.47 km/h)54.91 mph (88.37 km/h)
55 mph (88.51 km/h)60.4 mph (97.2 km/h)
60 mph (96.56 km/h)65.89 mph (106.04 km/h)
65 mph (104.61 km/h)71.38 mph (114.88 km/h)
70 mph (112.65 km/h)76.87 mph (123.71 km/h)
75 mph (120.7 km/h)82.36 mph (132.55 km/h)
80 mph (128.75 km/h)87.85 mph (141.39 km/h)
85 mph (136.79 km/h)93.34 mph (150.22 km/h)
90 mph (144.84 km/h)98.84 mph (159.06 km/h)
95 mph (152.89 km/h)104.33 mph (167.9 km/h)
100 mph (160.93 km/h)109.82 mph (176.73 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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