Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/30r22 vs 325/35r22 Tire Comparison Side By Side
  315/30-22 325/35-22 Difference
Diameter inches (mm) 29.44 (747.8) 30.96 (786.3) 1.52 (38.5) 5.1%
Width inches (mm) 12.4 (315) 12.8 (325) 0.39 (10) 3.2%
Circum. inches (mm) 92.49 (2349.28) 97.25 (2470.23) 4.76 (120.95) 5.1%
Sidewall Height inches (mm) 3.72 (94.5) 4.48 (113.75) 0.76 (19.25) 20.4%
Revolutions per mile (km) 685.04 (425.66) 651.49 (404.82) -33.54 (-20.84) -4.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.03 mph (33.84 km/h)
25 mph (40.23 km/h)26.29 mph (42.31 km/h)
30 mph (48.28 km/h)31.54 mph (50.77 km/h)
35 mph (56.33 km/h)36.8 mph (59.23 km/h)
40 mph (64.37 km/h)42.06 mph (67.69 km/h)
45 mph (72.42 km/h)47.32 mph (76.15 km/h)
50 mph (80.47 km/h)52.57 mph (84.61 km/h)
55 mph (88.51 km/h)57.83 mph (93.07 km/h)
60 mph (96.56 km/h)63.09 mph (101.53 km/h)
65 mph (104.61 km/h)68.35 mph (109.99 km/h)
70 mph (112.65 km/h)73.6 mph (118.45 km/h)
75 mph (120.7 km/h)78.86 mph (126.92 km/h)
80 mph (128.75 km/h)84.12 mph (135.38 km/h)
85 mph (136.79 km/h)89.38 mph (143.84 km/h)
90 mph (144.84 km/h)94.63 mph (152.3 km/h)
95 mph (152.89 km/h)99.89 mph (160.76 km/h)
100 mph (160.93 km/h)105.15 mph (169.22 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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