Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
150/80r16 vs 150/60r16 Tire Comparison Side By Side
  150/80-16 150/60-16 Difference
Diameter inches (mm) 25.45 (646.4) 23.09 (586.4) -2.36 (-60) -9.3%
Width inches (mm) 5.91 (150) 5.91 (150) 0 (0) 0%
Circum. inches (mm) 79.95 (2030.73) 72.53 (1842.23) -7.42 (-188.5) -9.3%
Sidewall Height inches (mm) 4.72 (120) 3.54 (90) -1.18 (-30) -25%
Revolutions per mile (km) 792.5 (492.43) 873.58 (542.82) 81.09 (50.39) 10.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.14 mph (29.2 km/h)
25 mph (40.23 km/h)22.68 mph (36.5 km/h)
30 mph (48.28 km/h)27.22 mph (43.8 km/h)
35 mph (56.33 km/h)31.75 mph (51.1 km/h)
40 mph (64.37 km/h)36.29 mph (58.4 km/h)
45 mph (72.42 km/h)40.82 mph (65.7 km/h)
50 mph (80.47 km/h)45.36 mph (73 km/h)
55 mph (88.51 km/h)49.89 mph (80.3 km/h)
60 mph (96.56 km/h)54.43 mph (87.6 km/h)
65 mph (104.61 km/h)58.97 mph (94.9 km/h)
70 mph (112.65 km/h)63.5 mph (102.2 km/h)
75 mph (120.7 km/h)68.04 mph (109.5 km/h)
80 mph (128.75 km/h)72.57 mph (116.8 km/h)
85 mph (136.79 km/h)77.11 mph (124.1 km/h)
90 mph (144.84 km/h)81.65 mph (131.4 km/h)
95 mph (152.89 km/h)86.18 mph (138.7 km/h)
100 mph (160.93 km/h)90.72 mph (146 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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