Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/35r19 vs 255/40r19 Tire Comparison Side By Side
  285/35-19 255/40-19 Difference
Diameter inches (mm) 26.85 (682.1) 27.03 (686.6) 0.18 (4.5) 0.7%
Width inches (mm) 11.22 (285) 10.04 (255) -1.18 (-30) -10.5%
Circum. inches (mm) 84.37 (2142.88) 84.92 (2157.02) 0.56 (14.14) 0.7%
Sidewall Height inches (mm) 3.93 (99.75) 4.02 (102) 0.09 (2.25) 2.3%
Revolutions per mile (km) 751.02 (466.66) 746.1 (463.6) -4.92 (-3.06) -0.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.13 mph (32.4 km/h)
25 mph (40.23 km/h)25.16 mph (40.5 km/h)
30 mph (48.28 km/h)30.2 mph (48.6 km/h)
35 mph (56.33 km/h)35.23 mph (56.7 km/h)
40 mph (64.37 km/h)40.26 mph (64.8 km/h)
45 mph (72.42 km/h)45.3 mph (72.9 km/h)
50 mph (80.47 km/h)50.33 mph (81 km/h)
55 mph (88.51 km/h)55.36 mph (89.1 km/h)
60 mph (96.56 km/h)60.4 mph (97.2 km/h)
65 mph (104.61 km/h)65.43 mph (105.3 km/h)
70 mph (112.65 km/h)70.46 mph (113.4 km/h)
75 mph (120.7 km/h)75.49 mph (121.5 km/h)
80 mph (128.75 km/h)80.53 mph (129.6 km/h)
85 mph (136.79 km/h)85.56 mph (137.7 km/h)
90 mph (144.84 km/h)90.59 mph (145.8 km/h)
95 mph (152.89 km/h)95.63 mph (153.9 km/h)
100 mph (160.93 km/h)100.66 mph (162 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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