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 305/45r17 Tire Comparison Side By Side
  335/35-17 305/45-17 Difference
Diameter inches (mm) 26.23 (666.3) 27.81 (706.3) 1.57 (40) 6%
Width inches (mm) 13.19 (335) 12.01 (305) -1.18 (-30) -9%
Circum. inches (mm) 82.41 (2093.24) 87.36 (2218.91) 4.95 (125.66) 6%
Sidewall Height inches (mm) 4.62 (117.25) 5.4 (137.25) 0.79 (20) 17.1%
Revolutions per mile (km) 768.83 (477.73) 725.29 (450.67) -43.54 (-27.06) -5.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.2 mph (34.12 km/h)
25 mph (40.23 km/h)26.5 mph (42.65 km/h)
30 mph (48.28 km/h)31.8 mph (51.18 km/h)
35 mph (56.33 km/h)37.1 mph (59.71 km/h)
40 mph (64.37 km/h)42.4 mph (68.24 km/h)
45 mph (72.42 km/h)47.7 mph (76.77 km/h)
50 mph (80.47 km/h)53 mph (85.3 km/h)
55 mph (88.51 km/h)58.3 mph (93.83 km/h)
60 mph (96.56 km/h)63.6 mph (102.36 km/h)
65 mph (104.61 km/h)68.9 mph (110.89 km/h)
70 mph (112.65 km/h)74.2 mph (119.42 km/h)
75 mph (120.7 km/h)79.5 mph (127.95 km/h)
80 mph (128.75 km/h)84.8 mph (136.48 km/h)
85 mph (136.79 km/h)90.1 mph (145.01 km/h)
90 mph (144.84 km/h)95.4 mph (153.54 km/h)
95 mph (152.89 km/h)100.7 mph (162.07 km/h)
100 mph (160.93 km/h)106 mph (170.6 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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