Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/75r16.5 vs 265/75r16 Tire Comparison Side By Side
  245/75-16.5 265/75-16 Difference
Diameter inches (mm) 30.97 (786.6) 31.65 (803.9) 0.68 (17.3) 2.2%
Width inches (mm) 9.65 (245) 10.43 (265) 0.79 (20) 8.2%
Circum. inches (mm) 97.29 (2471.18) 99.43 (2525.53) 2.14 (54.35) 2.2%
Sidewall Height inches (mm) 7.23 (183.75) 7.82 (198.75) 0.59 (15) 8.2%
Revolutions per mile (km) 651.25 (404.66) 637.23 (395.96) -14.01 (-8.71) -2.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.44 mph (32.89 km/h)
25 mph (40.23 km/h)25.55 mph (41.12 km/h)
30 mph (48.28 km/h)30.66 mph (49.34 km/h)
35 mph (56.33 km/h)35.77 mph (57.57 km/h)
40 mph (64.37 km/h)40.88 mph (65.79 km/h)
45 mph (72.42 km/h)45.99 mph (74.01 km/h)
50 mph (80.47 km/h)51.1 mph (82.24 km/h)
55 mph (88.51 km/h)56.21 mph (90.46 km/h)
60 mph (96.56 km/h)61.32 mph (98.68 km/h)
65 mph (104.61 km/h)66.43 mph (106.91 km/h)
70 mph (112.65 km/h)71.54 mph (115.13 km/h)
75 mph (120.7 km/h)76.65 mph (123.36 km/h)
80 mph (128.75 km/h)81.76 mph (131.58 km/h)
85 mph (136.79 km/h)86.87 mph (139.8 km/h)
90 mph (144.84 km/h)91.98 mph (148.03 km/h)
95 mph (152.89 km/h)97.09 mph (156.25 km/h)
100 mph (160.93 km/h)102.2 mph (164.47 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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