Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/55r22 vs 33/12.5r22 Tire Comparison Side By Side
  315/55-22 33/12.5-22 Difference
Diameter inches (mm) 35.64 (905.3) 33.02 (838.64) -2.62 (-66.66) -7.4%
Width inches (mm) 12.4 (315) 12.52 (318) 0.12 (3) 1%
Circum. inches (mm) 111.97 (2844.08) 103.73 (2634.67) -8.24 (-209.42) -7.4%
Sidewall Height inches (mm) 6.82 (173.25) 5.51 (139.92) -1.31 (-33.33) -19.2%
Revolutions per mile (km) 565.86 (351.61) 610.83 (379.55) 44.98 (27.95) 7.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.53 mph (29.82 km/h)
25 mph (40.23 km/h)23.16 mph (37.27 km/h)
30 mph (48.28 km/h)27.79 mph (44.73 km/h)
35 mph (56.33 km/h)32.42 mph (52.18 km/h)
40 mph (64.37 km/h)37.05 mph (59.63 km/h)
45 mph (72.42 km/h)41.69 mph (67.09 km/h)
50 mph (80.47 km/h)46.32 mph (74.54 km/h)
55 mph (88.51 km/h)50.95 mph (82 km/h)
60 mph (96.56 km/h)55.58 mph (89.45 km/h)
65 mph (104.61 km/h)60.21 mph (96.9 km/h)
70 mph (112.65 km/h)64.85 mph (104.36 km/h)
75 mph (120.7 km/h)69.48 mph (111.81 km/h)
80 mph (128.75 km/h)74.11 mph (119.27 km/h)
85 mph (136.79 km/h)78.74 mph (126.72 km/h)
90 mph (144.84 km/h)83.37 mph (134.18 km/h)
95 mph (152.89 km/h)88 mph (141.63 km/h)
100 mph (160.93 km/h)92.64 mph (149.08 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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