Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
345/35r19 vs 345/35r17 Tire Comparison Side By Side
  345/35-19 345/35-17 Difference
Diameter inches (mm) 28.51 (724.1) 26.51 (673.3) -2 (-50.8) -7%
Width inches (mm) 13.58 (345) 13.58 (345) 0 (0) 0%
Circum. inches (mm) 89.56 (2274.83) 83.28 (2115.23) -6.28 (-159.59) -7%
Sidewall Height inches (mm) 4.75 (120.75) 4.75 (120.75) 0 (0) 0%
Revolutions per mile (km) 707.46 (439.59) 760.83 (472.76) 53.38 (33.17) 7.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.6 mph (29.93 km/h)
25 mph (40.23 km/h)23.25 mph (37.41 km/h)
30 mph (48.28 km/h)27.9 mph (44.89 km/h)
35 mph (56.33 km/h)32.54 mph (52.38 km/h)
40 mph (64.37 km/h)37.19 mph (59.86 km/h)
45 mph (72.42 km/h)41.84 mph (67.34 km/h)
50 mph (80.47 km/h)46.49 mph (74.82 km/h)
55 mph (88.51 km/h)51.14 mph (82.3 km/h)
60 mph (96.56 km/h)55.79 mph (89.79 km/h)
65 mph (104.61 km/h)60.44 mph (97.27 km/h)
70 mph (112.65 km/h)65.09 mph (104.75 km/h)
75 mph (120.7 km/h)69.74 mph (112.23 km/h)
80 mph (128.75 km/h)74.39 mph (119.72 km/h)
85 mph (136.79 km/h)79.04 mph (127.2 km/h)
90 mph (144.84 km/h)83.69 mph (134.68 km/h)
95 mph (152.89 km/h)88.34 mph (142.16 km/h)
100 mph (160.93 km/h)92.98 mph (149.64 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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