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 395/70r16 Tire Comparison Side By Side
  35/12-16 395/70-16 Difference
Diameter inches (mm) 34.97 (888.3) 37.77 (959.4) 2.8 (71.1) 8%
Width inches (mm) 12.01 (305) 15.55 (395) 3.54 (90) 29.5%
Circum. inches (mm) 109.87 (2790.68) 118.66 (3014.04) 8.79 (223.37) 8%
Sidewall Height inches (mm) 9.49 (240.95) 10.89 (276.5) 1.4 (35.55) 14.8%
Revolutions per mile (km) 576.69 (358.34) 533.95 (331.78) -42.74 (-26.56) -7.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.6 mph (34.76 km/h)
25 mph (40.23 km/h)27 mph (43.45 km/h)
30 mph (48.28 km/h)32.4 mph (52.14 km/h)
35 mph (56.33 km/h)37.8 mph (60.84 km/h)
40 mph (64.37 km/h)43.2 mph (69.53 km/h)
45 mph (72.42 km/h)48.6 mph (78.22 km/h)
50 mph (80.47 km/h)54 mph (86.91 km/h)
55 mph (88.51 km/h)59.4 mph (95.6 km/h)
60 mph (96.56 km/h)64.8 mph (104.29 km/h)
65 mph (104.61 km/h)70.2 mph (112.98 km/h)
70 mph (112.65 km/h)75.6 mph (121.67 km/h)
75 mph (120.7 km/h)81 mph (130.36 km/h)
80 mph (128.75 km/h)86.4 mph (139.05 km/h)
85 mph (136.79 km/h)91.8 mph (147.74 km/h)
90 mph (144.84 km/h)97.2 mph (156.43 km/h)
95 mph (152.89 km/h)102.6 mph (165.13 km/h)
100 mph (160.93 km/h)108 mph (173.82 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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