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 130/80r16 Tire Comparison Side By Side
  150/80-16 130/80-16 Difference
Diameter inches (mm) 25.45 (646.4) 24.19 (614.4) -1.26 (-32) -5%
Width inches (mm) 5.91 (150) 5.12 (130) -0.79 (-20) -13.3%
Circum. inches (mm) 79.95 (2030.73) 75.99 (1930.19) -3.96 (-100.53) -5%
Sidewall Height inches (mm) 4.72 (120) 4.09 (104) -0.63 (-16) -13.3%
Revolutions per mile (km) 792.5 (492.43) 833.77 (518.08) 41.28 (25.65) 5.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.01 mph (30.59 km/h)
25 mph (40.23 km/h)23.76 mph (38.24 km/h)
30 mph (48.28 km/h)28.51 mph (45.89 km/h)
35 mph (56.33 km/h)33.27 mph (53.54 km/h)
40 mph (64.37 km/h)38.02 mph (61.19 km/h)
45 mph (72.42 km/h)42.77 mph (68.84 km/h)
50 mph (80.47 km/h)47.52 mph (76.48 km/h)
55 mph (88.51 km/h)52.28 mph (84.13 km/h)
60 mph (96.56 km/h)57.03 mph (91.78 km/h)
65 mph (104.61 km/h)61.78 mph (99.43 km/h)
70 mph (112.65 km/h)66.53 mph (107.08 km/h)
75 mph (120.7 km/h)71.29 mph (114.73 km/h)
80 mph (128.75 km/h)76.04 mph (122.37 km/h)
85 mph (136.79 km/h)80.79 mph (130.02 km/h)
90 mph (144.84 km/h)85.54 mph (137.67 km/h)
95 mph (152.89 km/h)90.3 mph (145.32 km/h)
100 mph (160.93 km/h)95.05 mph (152.97 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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