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 205/70r14 Tire Comparison Side By Side
  215/60-14 205/70-14 Difference
Diameter inches (mm) 24.16 (613.6) 25.3 (642.6) 1.14 (29) 4.7%
Width inches (mm) 8.46 (215) 8.07 (205) -0.39 (-10) -4.7%
Circum. inches (mm) 75.89 (1927.68) 79.48 (2018.79) 3.59 (91.11) 4.7%
Sidewall Height inches (mm) 5.08 (129) 5.65 (143.5) 0.57 (14.5) 11.2%
Revolutions per mile (km) 834.86 (518.76) 797.18 (495.35) -37.68 (-23.41) -4.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.95 mph (33.71 km/h)
25 mph (40.23 km/h)26.18 mph (42.14 km/h)
30 mph (48.28 km/h)31.42 mph (50.56 km/h)
35 mph (56.33 km/h)36.65 mph (58.99 km/h)
40 mph (64.37 km/h)41.89 mph (67.42 km/h)
45 mph (72.42 km/h)47.13 mph (75.84 km/h)
50 mph (80.47 km/h)52.36 mph (84.27 km/h)
55 mph (88.51 km/h)57.6 mph (92.7 km/h)
60 mph (96.56 km/h)62.84 mph (101.12 km/h)
65 mph (104.61 km/h)68.07 mph (109.55 km/h)
70 mph (112.65 km/h)73.31 mph (117.98 km/h)
75 mph (120.7 km/h)78.54 mph (126.41 km/h)
80 mph (128.75 km/h)83.78 mph (134.83 km/h)
85 mph (136.79 km/h)89.02 mph (143.26 km/h)
90 mph (144.84 km/h)94.25 mph (151.69 km/h)
95 mph (152.89 km/h)99.49 mph (160.11 km/h)
100 mph (160.93 km/h)104.73 mph (168.54 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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