Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/65r16 vs 285/65r16 Tire Comparison Side By Side
  275/65-16 285/65-16 Difference
Diameter inches (mm) 30.07 (763.9) 30.59 (776.9) 0.51 (13) 1.7%
Width inches (mm) 10.83 (275) 11.22 (285) 0.39 (10) 3.6%
Circum. inches (mm) 94.48 (2399.86) 96.09 (2440.7) 1.61 (40.84) 1.7%
Sidewall Height inches (mm) 7.04 (178.75) 7.29 (185.25) 0.26 (6.5) 3.6%
Revolutions per mile (km) 670.6 (416.69) 659.38 (409.72) -11.22 (-6.97) -1.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.34 mph (32.73 km/h)
25 mph (40.23 km/h)25.43 mph (40.92 km/h)
30 mph (48.28 km/h)30.51 mph (49.1 km/h)
35 mph (56.33 km/h)35.6 mph (57.29 km/h)
40 mph (64.37 km/h)40.68 mph (65.47 km/h)
45 mph (72.42 km/h)45.77 mph (73.65 km/h)
50 mph (80.47 km/h)50.85 mph (81.84 km/h)
55 mph (88.51 km/h)55.94 mph (90.02 km/h)
60 mph (96.56 km/h)61.02 mph (98.2 km/h)
65 mph (104.61 km/h)66.11 mph (106.39 km/h)
70 mph (112.65 km/h)71.19 mph (114.57 km/h)
75 mph (120.7 km/h)76.28 mph (122.76 km/h)
80 mph (128.75 km/h)81.36 mph (130.94 km/h)
85 mph (136.79 km/h)86.45 mph (139.12 km/h)
90 mph (144.84 km/h)91.53 mph (147.31 km/h)
95 mph (152.89 km/h)96.62 mph (155.49 km/h)
100 mph (160.93 km/h)101.7 mph (163.67 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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