Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
335/30r18 vs 335/35r18 Tire Comparison Side By Side
  335/30-18 335/35-18 Difference
Diameter inches (mm) 25.91 (658.2) 27.23 (691.7) 1.32 (33.5) 5.1%
Width inches (mm) 13.19 (335) 13.19 (335) 0 (0) 0%
Circum. inches (mm) 81.41 (2067.8) 85.55 (2173.04) 4.14 (105.24) 5.1%
Sidewall Height inches (mm) 3.96 (100.5) 4.62 (117.25) 0.66 (16.75) 16.7%
Revolutions per mile (km) 778.29 (483.61) 740.6 (460.18) -37.69 (-23.42) -4.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.02 mph (33.83 km/h)
25 mph (40.23 km/h)26.27 mph (42.28 km/h)
30 mph (48.28 km/h)31.53 mph (50.74 km/h)
35 mph (56.33 km/h)36.78 mph (59.19 km/h)
40 mph (64.37 km/h)42.04 mph (67.65 km/h)
45 mph (72.42 km/h)47.29 mph (76.11 km/h)
50 mph (80.47 km/h)52.54 mph (84.56 km/h)
55 mph (88.51 km/h)57.8 mph (93.02 km/h)
60 mph (96.56 km/h)63.05 mph (101.48 km/h)
65 mph (104.61 km/h)68.31 mph (109.93 km/h)
70 mph (112.65 km/h)73.56 mph (118.39 km/h)
75 mph (120.7 km/h)78.82 mph (126.84 km/h)
80 mph (128.75 km/h)84.07 mph (135.3 km/h)
85 mph (136.79 km/h)89.33 mph (143.76 km/h)
90 mph (144.84 km/h)94.58 mph (152.21 km/h)
95 mph (152.89 km/h)99.84 mph (160.67 km/h)
100 mph (160.93 km/h)105.09 mph (169.13 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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