Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/90r15 vs 215/75r15 Tire Comparison Side By Side
  205/90-15 215/75-15 Difference
Diameter inches (mm) 29.53 (750) 27.7 (703.5) -1.83 (-46.5) -6.2%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 92.76 (2356.19) 87.01 (2210.11) -5.75 (-146.08) -6.2%
Sidewall Height inches (mm) 7.26 (184.5) 6.35 (161.25) -0.92 (-23.25) -12.6%
Revolutions per mile (km) 683.03 (424.41) 728.17 (452.47) 45.15 (28.05) 6.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.76 mph (30.19 km/h)
25 mph (40.23 km/h)23.45 mph (37.74 km/h)
30 mph (48.28 km/h)28.14 mph (45.29 km/h)
35 mph (56.33 km/h)32.83 mph (52.83 km/h)
40 mph (64.37 km/h)37.52 mph (60.38 km/h)
45 mph (72.42 km/h)42.21 mph (67.93 km/h)
50 mph (80.47 km/h)46.9 mph (75.48 km/h)
55 mph (88.51 km/h)51.59 mph (83.03 km/h)
60 mph (96.56 km/h)56.28 mph (90.57 km/h)
65 mph (104.61 km/h)60.97 mph (98.12 km/h)
70 mph (112.65 km/h)65.66 mph (105.67 km/h)
75 mph (120.7 km/h)70.35 mph (113.22 km/h)
80 mph (128.75 km/h)75.04 mph (120.77 km/h)
85 mph (136.79 km/h)79.73 mph (128.31 km/h)
90 mph (144.84 km/h)84.42 mph (135.86 km/h)
95 mph (152.89 km/h)89.11 mph (143.41 km/h)
100 mph (160.93 km/h)93.8 mph (150.96 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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