Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
35/12r16 vs 345/70r16 Tire Comparison Side By Side
  35/12-16 345/70-16 Difference
Diameter inches (mm) 34.97 (888.3) 35.02 (889.4) 0.04 (1.1) 0.1%
Width inches (mm) 12.01 (305) 13.58 (345) 1.57 (40) 13.1%
Circum. inches (mm) 109.87 (2790.68) 110.01 (2794.13) 0.14 (3.46) 0.1%
Sidewall Height inches (mm) 9.49 (240.95) 9.51 (241.5) 0.02 (0.55) 0.2%
Revolutions per mile (km) 576.69 (358.34) 575.97 (357.89) -0.71 (-0.44) -0.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.02 mph (32.23 km/h)
25 mph (40.23 km/h)25.03 mph (40.28 km/h)
30 mph (48.28 km/h)30.04 mph (48.34 km/h)
35 mph (56.33 km/h)35.04 mph (56.4 km/h)
40 mph (64.37 km/h)40.05 mph (64.45 km/h)
45 mph (72.42 km/h)45.06 mph (72.51 km/h)
50 mph (80.47 km/h)50.06 mph (80.57 km/h)
55 mph (88.51 km/h)55.07 mph (88.62 km/h)
60 mph (96.56 km/h)60.07 mph (96.68 km/h)
65 mph (104.61 km/h)65.08 mph (104.74 km/h)
70 mph (112.65 km/h)70.09 mph (112.79 km/h)
75 mph (120.7 km/h)75.09 mph (120.85 km/h)
80 mph (128.75 km/h)80.1 mph (128.91 km/h)
85 mph (136.79 km/h)85.11 mph (136.96 km/h)
90 mph (144.84 km/h)90.11 mph (145.02 km/h)
95 mph (152.89 km/h)95.12 mph (153.08 km/h)
100 mph (160.93 km/h)100.12 mph (161.13 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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