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 160/70r16 Tire Comparison Side By Side
  150/80-16 160/70-16 Difference
Diameter inches (mm) 25.45 (646.4) 24.82 (630.4) -0.63 (-16) -2.5%
Width inches (mm) 5.91 (150) 6.3 (160) 0.39 (10) 6.7%
Circum. inches (mm) 79.95 (2030.73) 77.97 (1980.46) -1.98 (-50.27) -2.5%
Sidewall Height inches (mm) 4.72 (120) 4.41 (112) -0.31 (-8) -6.7%
Revolutions per mile (km) 792.5 (492.43) 812.61 (504.93) 20.11 (12.5) 2.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.5 mph (31.39 km/h)
25 mph (40.23 km/h)24.38 mph (39.24 km/h)
30 mph (48.28 km/h)29.26 mph (47.09 km/h)
35 mph (56.33 km/h)34.13 mph (54.93 km/h)
40 mph (64.37 km/h)39.01 mph (62.78 km/h)
45 mph (72.42 km/h)43.89 mph (70.63 km/h)
50 mph (80.47 km/h)48.76 mph (78.48 km/h)
55 mph (88.51 km/h)53.64 mph (86.32 km/h)
60 mph (96.56 km/h)58.51 mph (94.17 km/h)
65 mph (104.61 km/h)63.39 mph (102.02 km/h)
70 mph (112.65 km/h)68.27 mph (109.87 km/h)
75 mph (120.7 km/h)73.14 mph (117.71 km/h)
80 mph (128.75 km/h)78.02 mph (125.56 km/h)
85 mph (136.79 km/h)82.9 mph (133.41 km/h)
90 mph (144.84 km/h)87.77 mph (141.26 km/h)
95 mph (152.89 km/h)92.65 mph (149.1 km/h)
100 mph (160.93 km/h)97.52 mph (156.95 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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