Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/60r16 vs 255/60r16 Tire Comparison Side By Side
  205/60-16 255/60-16 Difference
Diameter inches (mm) 25.69 (652.4) 28.05 (712.4) 2.36 (60) 9.2%
Width inches (mm) 8.07 (205) 10.04 (255) 1.97 (50) 24.4%
Circum. inches (mm) 80.69 (2049.58) 88.11 (2238.07) 7.42 (188.5) 9.2%
Sidewall Height inches (mm) 4.84 (123) 6.02 (153) 1.18 (30) 24.4%
Revolutions per mile (km) 785.21 (487.91) 719.08 (446.81) -66.13 (-41.09) -8.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.84 mph (35.15 km/h)
25 mph (40.23 km/h)27.3 mph (43.93 km/h)
30 mph (48.28 km/h)32.76 mph (52.72 km/h)
35 mph (56.33 km/h)38.22 mph (61.51 km/h)
40 mph (64.37 km/h)43.68 mph (70.29 km/h)
45 mph (72.42 km/h)49.14 mph (79.08 km/h)
50 mph (80.47 km/h)54.6 mph (87.87 km/h)
55 mph (88.51 km/h)60.06 mph (96.65 km/h)
60 mph (96.56 km/h)65.52 mph (105.44 km/h)
65 mph (104.61 km/h)70.98 mph (114.23 km/h)
70 mph (112.65 km/h)76.44 mph (123.01 km/h)
75 mph (120.7 km/h)81.9 mph (131.8 km/h)
80 mph (128.75 km/h)87.36 mph (140.59 km/h)
85 mph (136.79 km/h)92.82 mph (149.38 km/h)
90 mph (144.84 km/h)98.28 mph (158.16 km/h)
95 mph (152.89 km/h)103.74 mph (166.95 km/h)
100 mph (160.93 km/h)109.2 mph (175.74 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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