Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/60r15 vs 215/60r15 Tire Comparison Side By Side
  205/60-15 215/60-15 Difference
Diameter inches (mm) 24.69 (627) 25.16 (639) 0.47 (12) 1.9%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 77.55 (1969.78) 79.03 (2007.48) 1.48 (37.7) 1.9%
Sidewall Height inches (mm) 4.84 (123) 5.08 (129) 0.24 (6) 4.9%
Revolutions per mile (km) 817.02 (507.67) 801.67 (498.14) -15.34 (-9.53) -1.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.38 mph (32.8 km/h)
25 mph (40.23 km/h)25.48 mph (41 km/h)
30 mph (48.28 km/h)30.57 mph (49.2 km/h)
35 mph (56.33 km/h)35.67 mph (57.41 km/h)
40 mph (64.37 km/h)40.77 mph (65.61 km/h)
45 mph (72.42 km/h)45.86 mph (73.81 km/h)
50 mph (80.47 km/h)50.96 mph (82.01 km/h)
55 mph (88.51 km/h)56.05 mph (90.21 km/h)
60 mph (96.56 km/h)61.15 mph (98.41 km/h)
65 mph (104.61 km/h)66.24 mph (106.61 km/h)
70 mph (112.65 km/h)71.34 mph (114.81 km/h)
75 mph (120.7 km/h)76.44 mph (123.01 km/h)
80 mph (128.75 km/h)81.53 mph (131.21 km/h)
85 mph (136.79 km/h)86.63 mph (139.41 km/h)
90 mph (144.84 km/h)91.72 mph (147.61 km/h)
95 mph (152.89 km/h)96.82 mph (155.81 km/h)
100 mph (160.93 km/h)101.91 mph (164.01 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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