Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
140/85r16 vs 175/60r16 Tire Comparison Side By Side
  140/85-16 175/60-16 Difference
Diameter inches (mm) 25.37 (644.4) 24.27 (616.4) -1.1 (-28) -4.3%
Width inches (mm) 5.51 (140) 6.89 (175) 1.38 (35) 25%
Circum. inches (mm) 79.7 (2024.44) 76.24 (1936.48) -3.46 (-87.96) -4.3%
Sidewall Height inches (mm) 4.69 (119) 4.13 (105) -0.55 (-14) -11.8%
Revolutions per mile (km) 794.96 (493.96) 831.07 (516.4) 36.11 (22.44) 4.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.13 mph (30.79 km/h)
25 mph (40.23 km/h)23.91 mph (38.49 km/h)
30 mph (48.28 km/h)28.7 mph (46.18 km/h)
35 mph (56.33 km/h)33.48 mph (53.88 km/h)
40 mph (64.37 km/h)38.26 mph (61.58 km/h)
45 mph (72.42 km/h)43.04 mph (69.27 km/h)
50 mph (80.47 km/h)47.83 mph (76.97 km/h)
55 mph (88.51 km/h)52.61 mph (84.67 km/h)
60 mph (96.56 km/h)57.39 mph (92.37 km/h)
65 mph (104.61 km/h)62.18 mph (100.06 km/h)
70 mph (112.65 km/h)66.96 mph (107.76 km/h)
75 mph (120.7 km/h)71.74 mph (115.46 km/h)
80 mph (128.75 km/h)76.52 mph (123.15 km/h)
85 mph (136.79 km/h)81.31 mph (130.85 km/h)
90 mph (144.84 km/h)86.09 mph (138.55 km/h)
95 mph (152.89 km/h)90.87 mph (146.24 km/h)
100 mph (160.93 km/h)95.65 mph (153.94 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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