Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
125/90r16 vs 225/100r16 Tire Comparison Side By Side
  125/90-16 225/100-16 Difference
Diameter inches (mm) 24.86 (631.4) 33.72 (856.4) 8.86 (225) 35.6%
Width inches (mm) 4.92 (125) 8.86 (225) 3.94 (100) 80%
Circum. inches (mm) 78.09 (1983.6) 105.92 (2690.46) 27.83 (706.86) 35.6%
Sidewall Height inches (mm) 4.43 (112.5) 8.86 (225) 4.43 (112.5) 100%
Revolutions per mile (km) 811.32 (504.13) 598.17 (371.68) -213.16 (-132.45) -26.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)27.13 mph (43.66 km/h)
25 mph (40.23 km/h)33.91 mph (54.57 km/h)
30 mph (48.28 km/h)40.69 mph (65.49 km/h)
35 mph (56.33 km/h)47.47 mph (76.4 km/h)
40 mph (64.37 km/h)54.25 mph (87.31 km/h)
45 mph (72.42 km/h)61.04 mph (98.23 km/h)
50 mph (80.47 km/h)67.82 mph (109.14 km/h)
55 mph (88.51 km/h)74.6 mph (120.06 km/h)
60 mph (96.56 km/h)81.38 mph (130.97 km/h)
65 mph (104.61 km/h)88.16 mph (141.88 km/h)
70 mph (112.65 km/h)94.94 mph (152.8 km/h)
75 mph (120.7 km/h)101.73 mph (163.71 km/h)
80 mph (128.75 km/h)108.51 mph (174.63 km/h)
85 mph (136.79 km/h)115.29 mph (185.54 km/h)
90 mph (144.84 km/h)122.07 mph (196.46 km/h)
95 mph (152.89 km/h)128.85 mph (207.37 km/h)
100 mph (160.93 km/h)135.64 mph (218.28 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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