Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/70r14 vs 205/60r15 Tire Comparison Side By Side
  205/70-14 205/60-15 Difference
Diameter inches (mm) 25.3 (642.6) 24.69 (627) -0.61 (-15.6) -2.4%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 79.48 (2018.79) 77.55 (1969.78) -1.93 (-49.01) -2.4%
Sidewall Height inches (mm) 5.65 (143.5) 4.84 (123) -0.81 (-20.5) -14.3%
Revolutions per mile (km) 797.18 (495.35) 817.02 (507.67) 19.83 (12.32) 2.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.51 mph (31.41 km/h)
25 mph (40.23 km/h)24.39 mph (39.26 km/h)
30 mph (48.28 km/h)29.27 mph (47.11 km/h)
35 mph (56.33 km/h)34.15 mph (54.96 km/h)
40 mph (64.37 km/h)39.03 mph (62.81 km/h)
45 mph (72.42 km/h)43.91 mph (70.66 km/h)
50 mph (80.47 km/h)48.79 mph (78.51 km/h)
55 mph (88.51 km/h)53.66 mph (86.37 km/h)
60 mph (96.56 km/h)58.54 mph (94.22 km/h)
65 mph (104.61 km/h)63.42 mph (102.07 km/h)
70 mph (112.65 km/h)68.3 mph (109.92 km/h)
75 mph (120.7 km/h)73.18 mph (117.77 km/h)
80 mph (128.75 km/h)78.06 mph (125.62 km/h)
85 mph (136.79 km/h)82.94 mph (133.47 km/h)
90 mph (144.84 km/h)87.82 mph (141.33 km/h)
95 mph (152.89 km/h)92.69 mph (149.18 km/h)
100 mph (160.93 km/h)97.57 mph (157.03 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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