Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
140/70r14 vs 130/70r14 Tire Comparison Side By Side
  140/70-14 130/70-14 Difference
Diameter inches (mm) 21.72 (551.6) 21.17 (537.6) -0.55 (-14) -2.5%
Width inches (mm) 5.51 (140) 5.12 (130) -0.39 (-10) -7.1%
Circum. inches (mm) 68.22 (1732.9) 66.49 (1688.92) -1.73 (-43.98) -2.5%
Sidewall Height inches (mm) 3.86 (98) 3.58 (91) -0.28 (-7) -7.1%
Revolutions per mile (km) 928.7 (577.07) 952.88 (592.09) 24.18 (15.03) 2.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.49 mph (31.37 km/h)
25 mph (40.23 km/h)24.37 mph (39.21 km/h)
30 mph (48.28 km/h)29.24 mph (47.06 km/h)
35 mph (56.33 km/h)34.11 mph (54.9 km/h)
40 mph (64.37 km/h)38.98 mph (62.74 km/h)
45 mph (72.42 km/h)43.86 mph (70.58 km/h)
50 mph (80.47 km/h)48.73 mph (78.43 km/h)
55 mph (88.51 km/h)53.6 mph (86.27 km/h)
60 mph (96.56 km/h)58.48 mph (94.11 km/h)
65 mph (104.61 km/h)63.35 mph (101.95 km/h)
70 mph (112.65 km/h)68.22 mph (109.8 km/h)
75 mph (120.7 km/h)73.1 mph (117.64 km/h)
80 mph (128.75 km/h)77.97 mph (125.48 km/h)
85 mph (136.79 km/h)82.84 mph (133.32 km/h)
90 mph (144.84 km/h)87.72 mph (141.17 km/h)
95 mph (152.89 km/h)92.59 mph (149.01 km/h)
100 mph (160.93 km/h)97.46 mph (156.85 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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