Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/70r16 vs 225/60r16 Tire Comparison Side By Side
  215/70-16 225/60-16 Difference
Diameter inches (mm) 27.85 (707.4) 26.63 (676.4) -1.22 (-31) -4.4%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 87.49 (2222.36) 83.66 (2124.97) -3.83 (-97.39) -4.4%
Sidewall Height inches (mm) 5.93 (150.5) 5.31 (135) -0.61 (-15.5) -10.3%
Revolutions per mile (km) 724.16 (449.97) 757.35 (470.59) 33.19 (20.62) 4.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.12 mph (30.78 km/h)
25 mph (40.23 km/h)23.9 mph (38.47 km/h)
30 mph (48.28 km/h)28.69 mph (46.16 km/h)
35 mph (56.33 km/h)33.47 mph (53.86 km/h)
40 mph (64.37 km/h)38.25 mph (61.55 km/h)
45 mph (72.42 km/h)43.03 mph (69.25 km/h)
50 mph (80.47 km/h)47.81 mph (76.94 km/h)
55 mph (88.51 km/h)52.59 mph (84.64 km/h)
60 mph (96.56 km/h)57.37 mph (92.33 km/h)
65 mph (104.61 km/h)62.15 mph (100.02 km/h)
70 mph (112.65 km/h)66.93 mph (107.72 km/h)
75 mph (120.7 km/h)71.71 mph (115.41 km/h)
80 mph (128.75 km/h)76.49 mph (123.11 km/h)
85 mph (136.79 km/h)81.28 mph (130.8 km/h)
90 mph (144.84 km/h)86.06 mph (138.49 km/h)
95 mph (152.89 km/h)90.84 mph (146.19 km/h)
100 mph (160.93 km/h)95.62 mph (153.88 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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