Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/90r16 vs 315/75r16 Tire Comparison Side By Side
  135/90-16 315/75-16 Difference
Diameter inches (mm) 25.57 (649.4) 34.6 (878.9) 9.04 (229.5) 35.3%
Width inches (mm) 5.31 (135) 12.4 (315) 7.09 (180) 133.3%
Circum. inches (mm) 80.32 (2040.15) 108.71 (2761.15) 28.39 (721) 35.3%
Sidewall Height inches (mm) 4.78 (121.5) 9.3 (236.25) 4.52 (114.75) 94.4%
Revolutions per mile (km) 788.84 (490.16) 582.85 (362.17) -205.98 (-127.99) -26.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)27.07 mph (43.56 km/h)
25 mph (40.23 km/h)33.84 mph (54.45 km/h)
30 mph (48.28 km/h)40.6 mph (65.34 km/h)
35 mph (56.33 km/h)47.37 mph (76.23 km/h)
40 mph (64.37 km/h)54.14 mph (87.12 km/h)
45 mph (72.42 km/h)60.9 mph (98.01 km/h)
50 mph (80.47 km/h)67.67 mph (108.9 km/h)
55 mph (88.51 km/h)74.44 mph (119.8 km/h)
60 mph (96.56 km/h)81.2 mph (130.69 km/h)
65 mph (104.61 km/h)87.97 mph (141.58 km/h)
70 mph (112.65 km/h)94.74 mph (152.47 km/h)
75 mph (120.7 km/h)101.51 mph (163.36 km/h)
80 mph (128.75 km/h)108.27 mph (174.25 km/h)
85 mph (136.79 km/h)115.04 mph (185.14 km/h)
90 mph (144.84 km/h)121.81 mph (196.03 km/h)
95 mph (152.89 km/h)128.57 mph (206.92 km/h)
100 mph (160.93 km/h)135.34 mph (217.81 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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