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 245/75r16 Tire Comparison Side By Side
  205/75-16 245/75-16 Difference
Diameter inches (mm) 28.11 (713.9) 30.47 (773.9) 2.36 (60) 8.4%
Width inches (mm) 8.07 (205) 9.65 (245) 1.57 (40) 19.5%
Circum. inches (mm) 88.3 (2242.78) 95.72 (2431.28) 7.42 (188.5) 8.4%
Sidewall Height inches (mm) 6.05 (153.75) 7.23 (183.75) 1.18 (30) 19.5%
Revolutions per mile (km) 717.57 (445.87) 661.93 (411.31) -55.63 (-34.57) -7.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.68 mph (34.89 km/h)
25 mph (40.23 km/h)27.1 mph (43.62 km/h)
30 mph (48.28 km/h)32.52 mph (52.34 km/h)
35 mph (56.33 km/h)37.94 mph (61.06 km/h)
40 mph (64.37 km/h)43.36 mph (69.78 km/h)
45 mph (72.42 km/h)48.78 mph (78.51 km/h)
50 mph (80.47 km/h)54.2 mph (87.23 km/h)
55 mph (88.51 km/h)59.62 mph (95.95 km/h)
60 mph (96.56 km/h)65.04 mph (104.68 km/h)
65 mph (104.61 km/h)70.46 mph (113.4 km/h)
70 mph (112.65 km/h)75.88 mph (122.12 km/h)
75 mph (120.7 km/h)81.3 mph (130.85 km/h)
80 mph (128.75 km/h)86.72 mph (139.57 km/h)
85 mph (136.79 km/h)92.14 mph (148.29 km/h)
90 mph (144.84 km/h)97.56 mph (157.01 km/h)
95 mph (152.89 km/h)102.98 mph (165.74 km/h)
100 mph (160.93 km/h)108.4 mph (174.46 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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