Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/50r16 vs 215/60r16 Tire Comparison Side By Side
  225/50-16 215/60-16 Difference
Diameter inches (mm) 24.86 (631.4) 26.16 (664.4) 1.3 (33) 5.2%
Width inches (mm) 8.86 (225) 8.46 (215) -0.39 (-10) -4.4%
Circum. inches (mm) 78.09 (1983.6) 82.18 (2087.27) 4.08 (103.67) 5.2%
Sidewall Height inches (mm) 4.43 (112.5) 5.08 (129) 0.65 (16.5) 14.7%
Revolutions per mile (km) 811.32 (504.13) 771.03 (479.09) -40.3 (-25.04) -5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.05 mph (33.87 km/h)
25 mph (40.23 km/h)26.31 mph (42.34 km/h)
30 mph (48.28 km/h)31.57 mph (50.8 km/h)
35 mph (56.33 km/h)36.83 mph (59.27 km/h)
40 mph (64.37 km/h)42.09 mph (67.74 km/h)
45 mph (72.42 km/h)47.35 mph (76.21 km/h)
50 mph (80.47 km/h)52.61 mph (84.67 km/h)
55 mph (88.51 km/h)57.87 mph (93.14 km/h)
60 mph (96.56 km/h)63.14 mph (101.61 km/h)
65 mph (104.61 km/h)68.4 mph (110.07 km/h)
70 mph (112.65 km/h)73.66 mph (118.54 km/h)
75 mph (120.7 km/h)78.92 mph (127.01 km/h)
80 mph (128.75 km/h)84.18 mph (135.48 km/h)
85 mph (136.79 km/h)89.44 mph (143.94 km/h)
90 mph (144.84 km/h)94.7 mph (152.41 km/h)
95 mph (152.89 km/h)99.97 mph (160.88 km/h)
100 mph (160.93 km/h)105.23 mph (169.35 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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