Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/65r16 vs 285/65r16 Tire Comparison Side By Side
  265/65-16 285/65-16 Difference
Diameter inches (mm) 29.56 (750.9) 30.59 (776.9) 1.02 (26) 3.5%
Width inches (mm) 10.43 (265) 11.22 (285) 0.79 (20) 7.5%
Circum. inches (mm) 92.87 (2359.02) 96.09 (2440.7) 3.22 (81.68) 3.5%
Sidewall Height inches (mm) 6.78 (172.25) 7.29 (185.25) 0.51 (13) 7.5%
Revolutions per mile (km) 682.21 (423.9) 659.38 (409.72) -22.83 (-14.19) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.69 mph (33.3 km/h)
25 mph (40.23 km/h)25.87 mph (41.63 km/h)
30 mph (48.28 km/h)31.04 mph (49.95 km/h)
35 mph (56.33 km/h)36.21 mph (58.28 km/h)
40 mph (64.37 km/h)41.39 mph (66.6 km/h)
45 mph (72.42 km/h)46.56 mph (74.93 km/h)
50 mph (80.47 km/h)51.73 mph (83.25 km/h)
55 mph (88.51 km/h)56.9 mph (91.58 km/h)
60 mph (96.56 km/h)62.08 mph (99.9 km/h)
65 mph (104.61 km/h)67.25 mph (108.23 km/h)
70 mph (112.65 km/h)72.42 mph (116.55 km/h)
75 mph (120.7 km/h)77.6 mph (124.88 km/h)
80 mph (128.75 km/h)82.77 mph (133.21 km/h)
85 mph (136.79 km/h)87.94 mph (141.53 km/h)
90 mph (144.84 km/h)93.12 mph (149.86 km/h)
95 mph (152.89 km/h)98.29 mph (158.18 km/h)
100 mph (160.93 km/h)103.46 mph (166.51 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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