Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
110/80r14 vs 100/80r14 Tire Comparison Side By Side
  110/80-14 100/80-14 Difference
Diameter inches (mm) 20.93 (531.6) 20.3 (515.6) -0.63 (-16) -3%
Width inches (mm) 4.33 (110) 3.94 (100) -0.39 (-10) -9.1%
Circum. inches (mm) 65.75 (1670.07) 63.77 (1619.81) -1.98 (-50.27) -3%
Sidewall Height inches (mm) 3.46 (88) 3.15 (80) -0.31 (-8) -9.1%
Revolutions per mile (km) 963.64 (598.78) 993.54 (617.36) 29.9 (18.58) 3.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.4 mph (31.22 km/h)
25 mph (40.23 km/h)24.25 mph (39.02 km/h)
30 mph (48.28 km/h)29.1 mph (46.83 km/h)
35 mph (56.33 km/h)33.95 mph (54.63 km/h)
40 mph (64.37 km/h)38.8 mph (62.44 km/h)
45 mph (72.42 km/h)43.65 mph (70.24 km/h)
50 mph (80.47 km/h)48.5 mph (78.05 km/h)
55 mph (88.51 km/h)53.34 mph (85.85 km/h)
60 mph (96.56 km/h)58.19 mph (93.65 km/h)
65 mph (104.61 km/h)63.04 mph (101.46 km/h)
70 mph (112.65 km/h)67.89 mph (109.26 km/h)
75 mph (120.7 km/h)72.74 mph (117.07 km/h)
80 mph (128.75 km/h)77.59 mph (124.87 km/h)
85 mph (136.79 km/h)82.44 mph (132.68 km/h)
90 mph (144.84 km/h)87.29 mph (140.48 km/h)
95 mph (152.89 km/h)92.14 mph (148.29 km/h)
100 mph (160.93 km/h)96.99 mph (156.09 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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