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 215/85r16 Tire Comparison Side By Side
  205/75-16 215/85-16 Difference
Diameter inches (mm) 28.11 (713.9) 30.39 (771.9) 2.28 (58) 8.1%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 88.3 (2242.78) 95.47 (2425) 7.17 (182.21) 8.1%
Sidewall Height inches (mm) 6.05 (153.75) 7.19 (182.75) 1.14 (29) 18.9%
Revolutions per mile (km) 717.57 (445.87) 663.65 (412.37) -53.92 (-33.5) -7.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.62 mph (34.8 km/h)
25 mph (40.23 km/h)27.03 mph (43.5 km/h)
30 mph (48.28 km/h)32.44 mph (52.2 km/h)
35 mph (56.33 km/h)37.84 mph (60.9 km/h)
40 mph (64.37 km/h)43.25 mph (69.6 km/h)
45 mph (72.42 km/h)48.66 mph (78.3 km/h)
50 mph (80.47 km/h)54.06 mph (87 km/h)
55 mph (88.51 km/h)59.47 mph (95.71 km/h)
60 mph (96.56 km/h)64.87 mph (104.41 km/h)
65 mph (104.61 km/h)70.28 mph (113.11 km/h)
70 mph (112.65 km/h)75.69 mph (121.81 km/h)
75 mph (120.7 km/h)81.09 mph (130.51 km/h)
80 mph (128.75 km/h)86.5 mph (139.21 km/h)
85 mph (136.79 km/h)91.91 mph (147.91 km/h)
90 mph (144.84 km/h)97.31 mph (156.61 km/h)
95 mph (152.89 km/h)102.72 mph (165.31 km/h)
100 mph (160.93 km/h)108.12 mph (174.01 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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