Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
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140/60r14 vs 110/80r14 Tire Comparison Side By Side
  140/60-14 110/80-14 Difference
Diameter inches (mm) 20.61 (523.6) 20.93 (531.6) 0.31 (8) 1.5%
Width inches (mm) 5.51 (140) 4.33 (110) -1.18 (-30) -21.4%
Circum. inches (mm) 64.76 (1644.94) 65.75 (1670.07) 0.99 (25.13) 1.5%
Sidewall Height inches (mm) 3.31 (84) 3.46 (88) 0.16 (4) 4.8%
Revolutions per mile (km) 978.36 (607.92) 963.64 (598.78) -14.72 (-9.15) -1.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.31 mph (32.68 km/h)
25 mph (40.23 km/h)25.38 mph (40.85 km/h)
30 mph (48.28 km/h)30.46 mph (49.02 km/h)
35 mph (56.33 km/h)35.53 mph (57.19 km/h)
40 mph (64.37 km/h)40.61 mph (65.36 km/h)
45 mph (72.42 km/h)45.69 mph (73.53 km/h)
50 mph (80.47 km/h)50.76 mph (81.7 km/h)
55 mph (88.51 km/h)55.84 mph (89.87 km/h)
60 mph (96.56 km/h)60.92 mph (98.04 km/h)
65 mph (104.61 km/h)65.99 mph (106.21 km/h)
70 mph (112.65 km/h)71.07 mph (114.38 km/h)
75 mph (120.7 km/h)76.15 mph (122.55 km/h)
80 mph (128.75 km/h)81.22 mph (130.71 km/h)
85 mph (136.79 km/h)86.3 mph (138.88 km/h)
90 mph (144.84 km/h)91.38 mph (147.05 km/h)
95 mph (152.89 km/h)96.45 mph (155.22 km/h)
100 mph (160.93 km/h)101.53 mph (163.39 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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