Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/80r17 vs 205/60r14 Tire Comparison Side By Side
  205/80-17 205/60-14 Difference
Diameter inches (mm) 29.91 (759.8) 23.69 (601.6) -6.23 (-158.2) -20.8%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 93.98 (2386.98) 74.41 (1889.98) -19.57 (-497) -20.8%
Sidewall Height inches (mm) 6.46 (164) 4.84 (123) -1.61 (-41) -25%
Revolutions per mile (km) 674.22 (418.94) 851.51 (529.1) 177.3 (110.17) 26.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)15.84 mph (25.49 km/h)
25 mph (40.23 km/h)19.79 mph (31.86 km/h)
30 mph (48.28 km/h)23.75 mph (38.23 km/h)
35 mph (56.33 km/h)27.71 mph (44.6 km/h)
40 mph (64.37 km/h)31.67 mph (50.97 km/h)
45 mph (72.42 km/h)35.63 mph (57.34 km/h)
50 mph (80.47 km/h)39.59 mph (63.71 km/h)
55 mph (88.51 km/h)43.55 mph (70.08 km/h)
60 mph (96.56 km/h)47.51 mph (76.46 km/h)
65 mph (104.61 km/h)51.47 mph (82.83 km/h)
70 mph (112.65 km/h)55.43 mph (89.2 km/h)
75 mph (120.7 km/h)59.38 mph (95.57 km/h)
80 mph (128.75 km/h)63.34 mph (101.94 km/h)
85 mph (136.79 km/h)67.3 mph (108.31 km/h)
90 mph (144.84 km/h)71.26 mph (114.68 km/h)
95 mph (152.89 km/h)75.22 mph (121.05 km/h)
100 mph (160.93 km/h)79.18 mph (127.43 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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