Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
335/35r17 vs 335/75r18 Tire Comparison Side By Side
  335/35-17 335/75-18 Difference
Diameter inches (mm) 26.23 (666.3) 37.78 (959.7) 11.55 (293.4) 44%
Width inches (mm) 13.19 (335) 13.19 (335) 0 (0) 0%
Circum. inches (mm) 82.41 (2093.24) 118.7 (3014.99) 36.29 (921.74) 44%
Sidewall Height inches (mm) 4.62 (117.25) 9.89 (251.25) 5.28 (134) 114.3%
Revolutions per mile (km) 768.83 (477.73) 533.78 (331.68) -235.05 (-146.05) -30.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)28.81 mph (46.36 km/h)
25 mph (40.23 km/h)36.01 mph (57.95 km/h)
30 mph (48.28 km/h)43.21 mph (69.54 km/h)
35 mph (56.33 km/h)50.41 mph (81.13 km/h)
40 mph (64.37 km/h)57.61 mph (92.72 km/h)
45 mph (72.42 km/h)64.82 mph (104.31 km/h)
50 mph (80.47 km/h)72.02 mph (115.9 km/h)
55 mph (88.51 km/h)79.22 mph (127.49 km/h)
60 mph (96.56 km/h)86.42 mph (139.08 km/h)
65 mph (104.61 km/h)93.62 mph (150.67 km/h)
70 mph (112.65 km/h)100.82 mph (162.26 km/h)
75 mph (120.7 km/h)108.03 mph (173.85 km/h)
80 mph (128.75 km/h)115.23 mph (185.44 km/h)
85 mph (136.79 km/h)122.43 mph (197.03 km/h)
90 mph (144.84 km/h)129.63 mph (208.62 km/h)
95 mph (152.89 km/h)136.83 mph (220.21 km/h)
100 mph (160.93 km/h)144.03 mph (231.8 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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