Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/80r16 vs 215/60r16 Tire Comparison Side By Side
  135/80-16 215/60-16 Difference
Diameter inches (mm) 24.5 (622.4) 26.16 (664.4) 1.65 (42) 6.7%
Width inches (mm) 5.31 (135) 8.46 (215) 3.15 (80) 59.3%
Circum. inches (mm) 76.98 (1955.33) 82.18 (2087.27) 5.19 (131.95) 6.7%
Sidewall Height inches (mm) 4.25 (108) 5.08 (129) 0.83 (21) 19.4%
Revolutions per mile (km) 823.06 (511.42) 771.03 (479.09) -52.03 (-32.33) -6.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.35 mph (34.36 km/h)
25 mph (40.23 km/h)26.69 mph (42.95 km/h)
30 mph (48.28 km/h)32.02 mph (51.54 km/h)
35 mph (56.33 km/h)37.36 mph (60.13 km/h)
40 mph (64.37 km/h)42.7 mph (68.72 km/h)
45 mph (72.42 km/h)48.04 mph (77.31 km/h)
50 mph (80.47 km/h)53.37 mph (85.9 km/h)
55 mph (88.51 km/h)58.71 mph (94.49 km/h)
60 mph (96.56 km/h)64.05 mph (103.08 km/h)
65 mph (104.61 km/h)69.39 mph (111.67 km/h)
70 mph (112.65 km/h)74.72 mph (120.26 km/h)
75 mph (120.7 km/h)80.06 mph (128.85 km/h)
80 mph (128.75 km/h)85.4 mph (137.44 km/h)
85 mph (136.79 km/h)90.74 mph (146.03 km/h)
90 mph (144.84 km/h)96.07 mph (154.62 km/h)
95 mph (152.89 km/h)101.41 mph (163.2 km/h)
100 mph (160.93 km/h)106.75 mph (171.79 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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