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 140/70r14 Tire Comparison Side By Side
  110/80-14 140/70-14 Difference
Diameter inches (mm) 20.93 (531.6) 21.72 (551.6) 0.79 (20) 3.8%
Width inches (mm) 4.33 (110) 5.51 (140) 1.18 (30) 27.3%
Circum. inches (mm) 65.75 (1670.07) 68.22 (1732.9) 2.47 (62.83) 3.8%
Sidewall Height inches (mm) 3.46 (88) 3.86 (98) 0.39 (10) 11.4%
Revolutions per mile (km) 963.64 (598.78) 928.7 (577.07) -34.94 (-21.71) -3.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.75 mph (33.4 km/h)
25 mph (40.23 km/h)25.94 mph (41.75 km/h)
30 mph (48.28 km/h)31.13 mph (50.1 km/h)
35 mph (56.33 km/h)36.32 mph (58.45 km/h)
40 mph (64.37 km/h)41.5 mph (66.8 km/h)
45 mph (72.42 km/h)46.69 mph (75.15 km/h)
50 mph (80.47 km/h)51.88 mph (83.49 km/h)
55 mph (88.51 km/h)57.07 mph (91.84 km/h)
60 mph (96.56 km/h)62.26 mph (100.19 km/h)
65 mph (104.61 km/h)67.45 mph (108.54 km/h)
70 mph (112.65 km/h)72.63 mph (116.89 km/h)
75 mph (120.7 km/h)77.82 mph (125.24 km/h)
80 mph (128.75 km/h)83.01 mph (133.59 km/h)
85 mph (136.79 km/h)88.2 mph (141.94 km/h)
90 mph (144.84 km/h)93.39 mph (150.29 km/h)
95 mph (152.89 km/h)98.57 mph (158.64 km/h)
100 mph (160.93 km/h)103.76 mph (166.99 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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