Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/75r16 vs 235/75r15 Tire Comparison Side By Side
  205/75-16 235/75-15 Difference
Diameter inches (mm) 28.11 (713.9) 28.88 (733.5) 0.77 (19.6) 2.7%
Width inches (mm) 8.07 (205) 9.25 (235) 1.18 (30) 14.6%
Circum. inches (mm) 88.3 (2242.78) 90.72 (2304.36) 2.42 (61.58) 2.7%
Sidewall Height inches (mm) 6.05 (153.75) 6.94 (176.25) 0.89 (22.5) 14.6%
Revolutions per mile (km) 717.57 (445.87) 698.39 (433.96) -19.17 (-11.91) -2.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.55 mph (33.07 km/h)
25 mph (40.23 km/h)25.69 mph (41.34 km/h)
30 mph (48.28 km/h)30.82 mph (49.61 km/h)
35 mph (56.33 km/h)35.96 mph (57.87 km/h)
40 mph (64.37 km/h)41.1 mph (66.14 km/h)
45 mph (72.42 km/h)46.24 mph (74.41 km/h)
50 mph (80.47 km/h)51.37 mph (82.68 km/h)
55 mph (88.51 km/h)56.51 mph (90.94 km/h)
60 mph (96.56 km/h)61.65 mph (99.21 km/h)
65 mph (104.61 km/h)66.78 mph (107.48 km/h)
70 mph (112.65 km/h)71.92 mph (115.75 km/h)
75 mph (120.7 km/h)77.06 mph (124.01 km/h)
80 mph (128.75 km/h)82.2 mph (132.28 km/h)
85 mph (136.79 km/h)87.33 mph (140.55 km/h)
90 mph (144.84 km/h)92.47 mph (148.82 km/h)
95 mph (152.89 km/h)97.61 mph (157.09 km/h)
100 mph (160.93 km/h)102.75 mph (165.35 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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