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 205/65r16 Tire Comparison Side By Side
  205/80-17 205/65-16 Difference
Diameter inches (mm) 29.91 (759.8) 26.49 (672.9) -3.42 (-86.9) -11.4%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 93.98 (2386.98) 83.23 (2113.98) -10.75 (-273) -11.4%
Sidewall Height inches (mm) 6.46 (164) 5.25 (133.25) -1.21 (-30.75) -18.8%
Revolutions per mile (km) 674.22 (418.94) 761.29 (473.04) 87.07 (54.1) 12.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.71 mph (28.51 km/h)
25 mph (40.23 km/h)22.14 mph (35.63 km/h)
30 mph (48.28 km/h)26.57 mph (42.76 km/h)
35 mph (56.33 km/h)31 mph (49.88 km/h)
40 mph (64.37 km/h)35.43 mph (57.01 km/h)
45 mph (72.42 km/h)39.85 mph (64.14 km/h)
50 mph (80.47 km/h)44.28 mph (71.26 km/h)
55 mph (88.51 km/h)48.71 mph (78.39 km/h)
60 mph (96.56 km/h)53.14 mph (85.52 km/h)
65 mph (104.61 km/h)57.57 mph (92.64 km/h)
70 mph (112.65 km/h)61.99 mph (99.77 km/h)
75 mph (120.7 km/h)66.42 mph (106.9 km/h)
80 mph (128.75 km/h)70.85 mph (114.02 km/h)
85 mph (136.79 km/h)75.28 mph (121.15 km/h)
90 mph (144.84 km/h)79.71 mph (128.28 km/h)
95 mph (152.89 km/h)84.13 mph (135.4 km/h)
100 mph (160.93 km/h)88.56 mph (142.53 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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