Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/65r17 vs 225/60r17 Tire Comparison Side By Side
  215/65-17 225/60-17 Difference
Diameter inches (mm) 28 (711.3) 27.63 (701.8) -0.37 (-9.5) -1.3%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 87.98 (2234.61) 86.8 (2204.77) -1.18 (-29.85) -1.3%
Sidewall Height inches (mm) 5.5 (139.75) 5.31 (135) -0.19 (-4.75) -3.4%
Revolutions per mile (km) 720.19 (447.5) 729.94 (453.56) 9.75 (6.06) 1.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.73 mph (31.76 km/h)
25 mph (40.23 km/h)24.67 mph (39.7 km/h)
30 mph (48.28 km/h)29.6 mph (47.64 km/h)
35 mph (56.33 km/h)34.53 mph (55.57 km/h)
40 mph (64.37 km/h)39.47 mph (63.51 km/h)
45 mph (72.42 km/h)44.4 mph (71.45 km/h)
50 mph (80.47 km/h)49.33 mph (79.39 km/h)
55 mph (88.51 km/h)54.27 mph (87.33 km/h)
60 mph (96.56 km/h)59.2 mph (95.27 km/h)
65 mph (104.61 km/h)64.13 mph (103.21 km/h)
70 mph (112.65 km/h)69.07 mph (111.15 km/h)
75 mph (120.7 km/h)74 mph (119.09 km/h)
80 mph (128.75 km/h)78.93 mph (127.03 km/h)
85 mph (136.79 km/h)83.86 mph (134.97 km/h)
90 mph (144.84 km/h)88.8 mph (142.91 km/h)
95 mph (152.89 km/h)93.73 mph (150.85 km/h)
100 mph (160.93 km/h)98.66 mph (158.79 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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