Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/80r15 vs 205/95r15 Tire Comparison Side By Side
  205/80-15 205/95-15 Difference
Diameter inches (mm) 27.91 (709) 30.33 (770.5) 2.42 (61.5) 8.7%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 87.69 (2227.39) 95.3 (2420.6) 7.61 (193.21) 8.7%
Sidewall Height inches (mm) 6.46 (164) 7.67 (194.75) 1.21 (30.75) 18.8%
Revolutions per mile (km) 722.52 (448.96) 664.85 (413.12) -57.67 (-35.83) -8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.73 mph (34.98 km/h)
25 mph (40.23 km/h)27.17 mph (43.72 km/h)
30 mph (48.28 km/h)32.6 mph (52.47 km/h)
35 mph (56.33 km/h)38.04 mph (61.21 km/h)
40 mph (64.37 km/h)43.47 mph (69.96 km/h)
45 mph (72.42 km/h)48.9 mph (78.7 km/h)
50 mph (80.47 km/h)54.34 mph (87.45 km/h)
55 mph (88.51 km/h)59.77 mph (96.19 km/h)
60 mph (96.56 km/h)65.2 mph (104.94 km/h)
65 mph (104.61 km/h)70.64 mph (113.68 km/h)
70 mph (112.65 km/h)76.07 mph (122.43 km/h)
75 mph (120.7 km/h)81.51 mph (131.17 km/h)
80 mph (128.75 km/h)86.94 mph (139.92 km/h)
85 mph (136.79 km/h)92.37 mph (148.66 km/h)
90 mph (144.84 km/h)97.81 mph (157.41 km/h)
95 mph (152.89 km/h)103.24 mph (166.15 km/h)
100 mph (160.93 km/h)108.67 mph (174.89 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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