Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/65r16 vs 265/75r16 Tire Comparison Side By Side
  225/65-16 265/75-16 Difference
Diameter inches (mm) 27.52 (698.9) 31.65 (803.9) 4.13 (105) 15%
Width inches (mm) 8.86 (225) 10.43 (265) 1.57 (40) 17.8%
Circum. inches (mm) 86.44 (2195.66) 99.43 (2525.53) 12.99 (329.87) 15%
Sidewall Height inches (mm) 5.76 (146.25) 7.82 (198.75) 2.07 (52.5) 35.9%
Revolutions per mile (km) 732.97 (455.44) 637.23 (395.96) -95.74 (-59.49) -13.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23 mph (37.02 km/h)
25 mph (40.23 km/h)28.76 mph (46.28 km/h)
30 mph (48.28 km/h)34.51 mph (55.53 km/h)
35 mph (56.33 km/h)40.26 mph (64.79 km/h)
40 mph (64.37 km/h)46.01 mph (74.05 km/h)
45 mph (72.42 km/h)51.76 mph (83.3 km/h)
50 mph (80.47 km/h)57.51 mph (92.56 km/h)
55 mph (88.51 km/h)63.26 mph (101.81 km/h)
60 mph (96.56 km/h)69.01 mph (111.07 km/h)
65 mph (104.61 km/h)74.77 mph (120.32 km/h)
70 mph (112.65 km/h)80.52 mph (129.58 km/h)
75 mph (120.7 km/h)86.27 mph (138.83 km/h)
80 mph (128.75 km/h)92.02 mph (148.09 km/h)
85 mph (136.79 km/h)97.77 mph (157.35 km/h)
90 mph (144.84 km/h)103.52 mph (166.6 km/h)
95 mph (152.89 km/h)109.27 mph (175.86 km/h)
100 mph (160.93 km/h)115.02 mph (185.11 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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