Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
130/80r17 vs 130/90r17 Tire Comparison Side By Side
  130/80-17 130/90-17 Difference
Diameter inches (mm) 25.19 (639.8) 26.21 (665.8) 1.02 (26) 4.1%
Width inches (mm) 5.12 (130) 5.12 (130) 0 (0) 0%
Circum. inches (mm) 79.13 (2009.99) 82.35 (2091.67) 3.22 (81.68) 4.1%
Sidewall Height inches (mm) 4.09 (104) 4.61 (117) 0.51 (13) 12.5%
Revolutions per mile (km) 800.67 (497.51) 769.41 (478.09) -31.27 (-19.43) -3.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.81 mph (33.49 km/h)
25 mph (40.23 km/h)26.02 mph (41.87 km/h)
30 mph (48.28 km/h)31.22 mph (50.24 km/h)
35 mph (56.33 km/h)36.42 mph (58.62 km/h)
40 mph (64.37 km/h)41.63 mph (66.99 km/h)
45 mph (72.42 km/h)46.83 mph (75.36 km/h)
50 mph (80.47 km/h)52.03 mph (83.74 km/h)
55 mph (88.51 km/h)57.24 mph (92.11 km/h)
60 mph (96.56 km/h)62.44 mph (100.48 km/h)
65 mph (104.61 km/h)67.64 mph (108.86 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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