Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/82r15 vs 205/50r16 Tire Comparison Side By Side
  165/82-15 205/50-16 Difference
Diameter inches (mm) 25.65 (651.6) 24.07 (611.4) -1.58 (-40.2) -6.2%
Width inches (mm) 6.5 (165) 8.07 (205) 1.57 (40) 24.2%
Circum. inches (mm) 80.59 (2047.06) 75.62 (1920.77) -4.97 (-126.29) -6.2%
Sidewall Height inches (mm) 5.33 (135.3) 4.04 (102.5) -1.29 (-32.8) -24.2%
Revolutions per mile (km) 786.17 (488.5) 837.86 (520.62) 51.69 (32.12) 6.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.77 mph (30.2 km/h)
25 mph (40.23 km/h)23.46 mph (37.75 km/h)
30 mph (48.28 km/h)28.15 mph (45.3 km/h)
35 mph (56.33 km/h)32.84 mph (52.85 km/h)
40 mph (64.37 km/h)37.53 mph (60.4 km/h)
45 mph (72.42 km/h)42.22 mph (67.95 km/h)
50 mph (80.47 km/h)46.92 mph (75.5 km/h)
55 mph (88.51 km/h)51.61 mph (83.05 km/h)
60 mph (96.56 km/h)56.3 mph (90.6 km/h)
65 mph (104.61 km/h)60.99 mph (98.15 km/h)
70 mph (112.65 km/h)65.68 mph (105.7 km/h)
75 mph (120.7 km/h)70.37 mph (113.25 km/h)
80 mph (128.75 km/h)75.06 mph (120.8 km/h)
85 mph (136.79 km/h)79.76 mph (128.36 km/h)
90 mph (144.84 km/h)84.45 mph (135.91 km/h)
95 mph (152.89 km/h)89.14 mph (143.46 km/h)
100 mph (160.93 km/h)93.83 mph (151.01 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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