Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/35r16 vs 285/85r16 Tire Comparison Side By Side
  245/35-16 285/85-16 Difference
Diameter inches (mm) 22.75 (577.9) 35.07 (890.9) 12.32 (313) 54.2%
Width inches (mm) 9.65 (245) 11.22 (285) 1.57 (40) 16.3%
Circum. inches (mm) 71.48 (1815.53) 110.19 (2798.84) 38.71 (983.32) 54.2%
Sidewall Height inches (mm) 3.38 (85.75) 9.54 (242.25) 6.16 (156.5) 182.5%
Revolutions per mile (km) 886.43 (550.8) 575 (357.29) -311.43 (-193.51) -35.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)30.83 mph (49.62 km/h)
25 mph (40.23 km/h)38.54 mph (62.02 km/h)
30 mph (48.28 km/h)46.25 mph (74.43 km/h)
35 mph (56.33 km/h)53.96 mph (86.83 km/h)
40 mph (64.37 km/h)61.66 mph (99.24 km/h)
45 mph (72.42 km/h)69.37 mph (111.64 km/h)
50 mph (80.47 km/h)77.08 mph (124.05 km/h)
55 mph (88.51 km/h)84.79 mph (136.45 km/h)
60 mph (96.56 km/h)92.5 mph (148.86 km/h)
65 mph (104.61 km/h)100.21 mph (161.26 km/h)
70 mph (112.65 km/h)107.91 mph (173.67 km/h)
75 mph (120.7 km/h)115.62 mph (186.07 km/h)
80 mph (128.75 km/h)123.33 mph (198.48 km/h)
85 mph (136.79 km/h)131.04 mph (210.88 km/h)
90 mph (144.84 km/h)138.75 mph (223.29 km/h)
95 mph (152.89 km/h)146.45 mph (235.69 km/h)
100 mph (160.93 km/h)154.16 mph (248.1 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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