Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/70r13 vs 155/55r14 Tire Comparison Side By Side
  135/70-13 155/55-14 Difference
Diameter inches (mm) 20.44 (519.2) 20.71 (526.1) 0.27 (6.9) 1.3%
Width inches (mm) 5.31 (135) 6.1 (155) 0.79 (20) 14.8%
Circum. inches (mm) 64.22 (1631.11) 65.07 (1652.79) 0.85 (21.68) 1.3%
Sidewall Height inches (mm) 3.72 (94.5) 3.36 (85.25) -0.36 (-9.25) -9.8%
Revolutions per mile (km) 986.65 (613.08) 973.71 (605.04) -12.94 (-8.04) -1.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.27 mph (32.61 km/h)
25 mph (40.23 km/h)25.33 mph (40.77 km/h)
30 mph (48.28 km/h)30.4 mph (48.92 km/h)
35 mph (56.33 km/h)35.47 mph (57.08 km/h)
40 mph (64.37 km/h)40.53 mph (65.23 km/h)
45 mph (72.42 km/h)45.6 mph (73.38 km/h)
50 mph (80.47 km/h)50.66 mph (81.54 km/h)
55 mph (88.51 km/h)55.73 mph (89.69 km/h)
60 mph (96.56 km/h)60.8 mph (97.84 km/h)
65 mph (104.61 km/h)65.86 mph (106 km/h)
70 mph (112.65 km/h)70.93 mph (114.15 km/h)
75 mph (120.7 km/h)76 mph (122.31 km/h)
80 mph (128.75 km/h)81.06 mph (130.46 km/h)
85 mph (136.79 km/h)86.13 mph (138.61 km/h)
90 mph (144.84 km/h)91.2 mph (146.77 km/h)
95 mph (152.89 km/h)96.26 mph (154.92 km/h)
100 mph (160.93 km/h)101.33 mph (163.07 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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