Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/60r14 vs 205/60r14 Tire Comparison Side By Side
  235/60-14 205/60-14 Difference
Diameter inches (mm) 25.1 (637.6) 23.69 (601.6) -1.42 (-36) -5.6%
Width inches (mm) 9.25 (235) 8.07 (205) -1.18 (-30) -12.8%
Circum. inches (mm) 78.86 (2003.08) 74.41 (1889.98) -4.45 (-113.1) -5.6%
Sidewall Height inches (mm) 5.55 (141) 4.84 (123) -0.71 (-18) -12.8%
Revolutions per mile (km) 803.43 (499.23) 851.51 (529.1) 48.08 (29.87) 6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.87 mph (30.37 km/h)
25 mph (40.23 km/h)23.59 mph (37.96 km/h)
30 mph (48.28 km/h)28.31 mph (45.55 km/h)
35 mph (56.33 km/h)33.02 mph (53.15 km/h)
40 mph (64.37 km/h)37.74 mph (60.74 km/h)
45 mph (72.42 km/h)42.46 mph (68.33 km/h)
50 mph (80.47 km/h)47.18 mph (75.92 km/h)
55 mph (88.51 km/h)51.89 mph (83.52 km/h)
60 mph (96.56 km/h)56.61 mph (91.11 km/h)
65 mph (104.61 km/h)61.33 mph (98.7 km/h)
70 mph (112.65 km/h)66.05 mph (106.29 km/h)
75 mph (120.7 km/h)70.77 mph (113.89 km/h)
80 mph (128.75 km/h)75.48 mph (121.48 km/h)
85 mph (136.79 km/h)80.2 mph (129.07 km/h)
90 mph (144.84 km/h)84.92 mph (136.66 km/h)
95 mph (152.89 km/h)89.64 mph (144.26 km/h)
100 mph (160.93 km/h)94.35 mph (151.85 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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