Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
130/80r15 vs 160/80r15 Tire Comparison Side By Side
  130/80-15 160/80-15 Difference
Diameter inches (mm) 23.19 (589) 25.08 (637) 1.89 (48) 8.1%
Width inches (mm) 5.12 (130) 6.3 (160) 1.18 (30) 23.1%
Circum. inches (mm) 72.85 (1850.4) 78.79 (2001.19) 5.94 (150.8) 8.1%
Sidewall Height inches (mm) 4.09 (104) 5.04 (128) 0.94 (24) 23.1%
Revolutions per mile (km) 869.73 (540.42) 804.19 (499.7) -65.54 (-40.72) -7.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.63 mph (34.81 km/h)
25 mph (40.23 km/h)27.04 mph (43.51 km/h)
30 mph (48.28 km/h)32.44 mph (52.21 km/h)
35 mph (56.33 km/h)37.85 mph (60.92 km/h)
40 mph (64.37 km/h)43.26 mph (69.62 km/h)
45 mph (72.42 km/h)48.67 mph (78.32 km/h)
50 mph (80.47 km/h)54.07 mph (87.02 km/h)
55 mph (88.51 km/h)59.48 mph (95.73 km/h)
60 mph (96.56 km/h)64.89 mph (104.43 km/h)
65 mph (104.61 km/h)70.3 mph (113.13 km/h)
70 mph (112.65 km/h)75.7 mph (121.83 km/h)
75 mph (120.7 km/h)81.11 mph (130.54 km/h)
80 mph (128.75 km/h)86.52 mph (139.24 km/h)
85 mph (136.79 km/h)91.93 mph (147.94 km/h)
90 mph (144.84 km/h)97.33 mph (156.64 km/h)
95 mph (152.89 km/h)102.74 mph (165.35 km/h)
100 mph (160.93 km/h)108.15 mph (174.05 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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