Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/75r16 vs 215/75r16 Tire Comparison Side By Side
  205/75-16 215/75-16 Difference
Diameter inches (mm) 28.11 (713.9) 28.7 (728.9) 0.59 (15) 2.1%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 88.3 (2242.78) 90.15 (2289.91) 1.86 (47.12) 2.1%
Sidewall Height inches (mm) 6.05 (153.75) 6.35 (161.25) 0.3 (7.5) 4.9%
Revolutions per mile (km) 717.57 (445.87) 702.8 (436.7) -14.77 (-9.18) -2.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.42 mph (32.86 km/h)
25 mph (40.23 km/h)25.53 mph (41.08 km/h)
30 mph (48.28 km/h)30.63 mph (49.29 km/h)
35 mph (56.33 km/h)35.74 mph (57.51 km/h)
40 mph (64.37 km/h)40.84 mph (65.73 km/h)
45 mph (72.42 km/h)45.95 mph (73.94 km/h)
50 mph (80.47 km/h)51.05 mph (82.16 km/h)
55 mph (88.51 km/h)56.16 mph (90.37 km/h)
60 mph (96.56 km/h)61.26 mph (98.59 km/h)
65 mph (104.61 km/h)66.37 mph (106.81 km/h)
70 mph (112.65 km/h)71.47 mph (115.02 km/h)
75 mph (120.7 km/h)76.58 mph (123.24 km/h)
80 mph (128.75 km/h)81.68 mph (131.45 km/h)
85 mph (136.79 km/h)86.79 mph (139.67 km/h)
90 mph (144.84 km/h)91.89 mph (147.88 km/h)
95 mph (152.89 km/h)97 mph (156.1 km/h)
100 mph (160.93 km/h)102.1 mph (164.32 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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