Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/95r14 vs 28/8.5r14 Tire Comparison Side By Side
  185/95-14 28/8.5-14 Difference
Diameter inches (mm) 27.84 (707.1) 27.95 (709.84) 0.11 (2.74) 0.4%
Width inches (mm) 7.28 (185) 8.5 (216) 1.22 (31) 16.8%
Circum. inches (mm) 87.46 (2221.42) 87.8 (2230.03) 0.34 (8.61) 0.4%
Sidewall Height inches (mm) 6.92 (175.75) 6.97 (177.12) 0.05 (1.37) 0.8%
Revolutions per mile (km) 724.47 (450.16) 721.67 (448.42) -2.8 (-1.74) -0.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.08 mph (32.31 km/h)
25 mph (40.23 km/h)25.1 mph (40.39 km/h)
30 mph (48.28 km/h)30.12 mph (48.47 km/h)
35 mph (56.33 km/h)35.14 mph (56.55 km/h)
40 mph (64.37 km/h)40.15 mph (64.62 km/h)
45 mph (72.42 km/h)45.17 mph (72.7 km/h)
50 mph (80.47 km/h)50.19 mph (80.78 km/h)
55 mph (88.51 km/h)55.21 mph (88.86 km/h)
60 mph (96.56 km/h)60.23 mph (96.93 km/h)
65 mph (104.61 km/h)65.25 mph (105.01 km/h)
70 mph (112.65 km/h)70.27 mph (113.09 km/h)
75 mph (120.7 km/h)75.29 mph (121.17 km/h)
80 mph (128.75 km/h)80.31 mph (129.25 km/h)
85 mph (136.79 km/h)85.33 mph (137.32 km/h)
90 mph (144.84 km/h)90.35 mph (145.4 km/h)
95 mph (152.89 km/h)95.37 mph (153.48 km/h)
100 mph (160.93 km/h)100.39 mph (161.56 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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