Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/75r16 vs 265/75r16 Tire Comparison Side By Side
  225/75-16 265/75-16 Difference
Diameter inches (mm) 29.29 (743.9) 31.65 (803.9) 2.36 (60) 8.1%
Width inches (mm) 8.86 (225) 10.43 (265) 1.57 (40) 17.8%
Circum. inches (mm) 92.01 (2337.03) 99.43 (2525.53) 7.42 (188.5) 8.1%
Sidewall Height inches (mm) 6.64 (168.75) 7.82 (198.75) 1.18 (30) 17.8%
Revolutions per mile (km) 688.63 (427.89) 637.23 (395.96) -51.4 (-31.94) -7.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.61 mph (34.78 km/h)
25 mph (40.23 km/h)27.02 mph (43.48 km/h)
30 mph (48.28 km/h)32.42 mph (52.17 km/h)
35 mph (56.33 km/h)37.82 mph (60.87 km/h)
40 mph (64.37 km/h)43.23 mph (69.57 km/h)
45 mph (72.42 km/h)48.63 mph (78.26 km/h)
50 mph (80.47 km/h)54.03 mph (86.96 km/h)
55 mph (88.51 km/h)59.44 mph (95.65 km/h)
60 mph (96.56 km/h)64.84 mph (104.35 km/h)
65 mph (104.61 km/h)70.24 mph (113.04 km/h)
70 mph (112.65 km/h)75.65 mph (121.74 km/h)
75 mph (120.7 km/h)81.05 mph (130.44 km/h)
80 mph (128.75 km/h)86.45 mph (139.13 km/h)
85 mph (136.79 km/h)91.86 mph (147.83 km/h)
90 mph (144.84 km/h)97.26 mph (156.52 km/h)
95 mph (152.89 km/h)102.66 mph (165.22 km/h)
100 mph (160.93 km/h)108.07 mph (173.92 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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