Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/70r16 vs 125/70r16 Tire Comparison Side By Side
  135/70-16 125/70-16 Difference
Diameter inches (mm) 23.44 (595.4) 22.89 (581.4) -0.55 (-14) -2.4%
Width inches (mm) 5.31 (135) 4.92 (125) -0.39 (-10) -7.4%
Circum. inches (mm) 73.64 (1870.5) 71.91 (1826.52) -1.73 (-43.98) -2.4%
Sidewall Height inches (mm) 3.72 (94.5) 3.44 (87.5) -0.28 (-7) -7.4%
Revolutions per mile (km) 860.38 (534.61) 881.1 (547.49) 20.72 (12.87) 2.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.53 mph (31.43 km/h)
25 mph (40.23 km/h)24.41 mph (39.29 km/h)
30 mph (48.28 km/h)29.29 mph (47.15 km/h)
35 mph (56.33 km/h)34.18 mph (55 km/h)
40 mph (64.37 km/h)39.06 mph (62.86 km/h)
45 mph (72.42 km/h)43.94 mph (70.72 km/h)
50 mph (80.47 km/h)48.82 mph (78.58 km/h)
55 mph (88.51 km/h)53.71 mph (86.43 km/h)
60 mph (96.56 km/h)58.59 mph (94.29 km/h)
65 mph (104.61 km/h)63.47 mph (102.15 km/h)
70 mph (112.65 km/h)68.35 mph (110.01 km/h)
75 mph (120.7 km/h)73.24 mph (117.86 km/h)
80 mph (128.75 km/h)78.12 mph (125.72 km/h)
85 mph (136.79 km/h)83 mph (133.58 km/h)
90 mph (144.84 km/h)87.88 mph (141.44 km/h)
95 mph (152.89 km/h)92.77 mph (149.29 km/h)
100 mph (160.93 km/h)97.65 mph (157.15 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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