Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/50r16 vs 215/65r16 Tire Comparison Side By Side
  205/50-16 215/65-16 Difference
Diameter inches (mm) 24.07 (611.4) 27 (685.9) 2.93 (74.5) 12.2%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 75.62 (1920.77) 84.84 (2154.82) 9.21 (234.05) 12.2%
Sidewall Height inches (mm) 4.04 (102.5) 5.5 (139.75) 1.47 (37.25) 36.3%
Revolutions per mile (km) 837.86 (520.62) 746.86 (464.08) -91.01 (-56.55) -10.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.44 mph (36.11 km/h)
25 mph (40.23 km/h)28.05 mph (45.14 km/h)
30 mph (48.28 km/h)33.66 mph (54.16 km/h)
35 mph (56.33 km/h)39.26 mph (63.19 km/h)
40 mph (64.37 km/h)44.87 mph (72.22 km/h)
45 mph (72.42 km/h)50.48 mph (81.25 km/h)
50 mph (80.47 km/h)56.09 mph (90.27 km/h)
55 mph (88.51 km/h)61.7 mph (99.3 km/h)
60 mph (96.56 km/h)67.31 mph (108.33 km/h)
65 mph (104.61 km/h)72.92 mph (117.35 km/h)
70 mph (112.65 km/h)78.53 mph (126.38 km/h)
75 mph (120.7 km/h)84.14 mph (135.41 km/h)
80 mph (128.75 km/h)89.75 mph (144.44 km/h)
85 mph (136.79 km/h)95.36 mph (153.46 km/h)
90 mph (144.84 km/h)100.97 mph (162.49 km/h)
95 mph (152.89 km/h)106.58 mph (171.52 km/h)
100 mph (160.93 km/h)112.19 mph (180.54 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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