Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
125/70r17 vs 205/60r16 Tire Comparison Side By Side
  125/70-17 205/60-16 Difference
Diameter inches (mm) 23.89 (606.8) 25.69 (652.4) 1.8 (45.6) 7.5%
Width inches (mm) 4.92 (125) 8.07 (205) 3.15 (80) 64%
Circum. inches (mm) 75.05 (1906.32) 80.69 (2049.58) 5.64 (143.26) 7.5%
Sidewall Height inches (mm) 3.44 (87.5) 4.84 (123) 1.4 (35.5) 40.6%
Revolutions per mile (km) 844.22 (524.57) 785.21 (487.91) -59.01 (-36.67) -7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.5 mph (34.61 km/h)
25 mph (40.23 km/h)26.88 mph (43.26 km/h)
30 mph (48.28 km/h)32.25 mph (51.91 km/h)
35 mph (56.33 km/h)37.63 mph (60.56 km/h)
40 mph (64.37 km/h)43.01 mph (69.21 km/h)
45 mph (72.42 km/h)48.38 mph (77.86 km/h)
50 mph (80.47 km/h)53.76 mph (86.51 km/h)
55 mph (88.51 km/h)59.13 mph (95.17 km/h)
60 mph (96.56 km/h)64.51 mph (103.82 km/h)
65 mph (104.61 km/h)69.88 mph (112.47 km/h)
70 mph (112.65 km/h)75.26 mph (121.12 km/h)
75 mph (120.7 km/h)80.64 mph (129.77 km/h)
80 mph (128.75 km/h)86.01 mph (138.42 km/h)
85 mph (136.79 km/h)91.39 mph (147.07 km/h)
90 mph (144.84 km/h)96.76 mph (155.73 km/h)
95 mph (152.89 km/h)102.14 mph (164.38 km/h)
100 mph (160.93 km/h)107.51 mph (173.03 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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