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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
27/8.5r15 vs 25/8.5r14 Tire Comparison Side By Side
  27/8.5-15 25/8.5-14 Difference
Diameter inches (mm) 27.08 (687.72) 25.06 (636.4) -2.02 (-51.32) -7.5%
Width inches (mm) 8.5 (216) 8.5 (216) 0 (0) 0%
Circum. inches (mm) 85.06 (2160.54) 78.71 (1999.31) -6.35 (-161.23) -7.5%
Sidewall Height inches (mm) 6.04 (153.36) 5.53 (140.4) -0.51 (-12.96) -8.5%
Revolutions per mile (km) 744.88 (462.85) 804.95 (500.17) 60.07 (37.32) 8.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.51 mph (29.79 km/h)
25 mph (40.23 km/h)23.13 mph (37.23 km/h)
30 mph (48.28 km/h)27.76 mph (44.68 km/h)
35 mph (56.33 km/h)32.39 mph (52.12 km/h)
40 mph (64.37 km/h)37.02 mph (59.57 km/h)
45 mph (72.42 km/h)41.64 mph (67.02 km/h)
50 mph (80.47 km/h)46.27 mph (74.46 km/h)
55 mph (88.51 km/h)50.9 mph (81.91 km/h)
60 mph (96.56 km/h)55.52 mph (89.36 km/h)
65 mph (104.61 km/h)60.15 mph (96.8 km/h)
70 mph (112.65 km/h)64.78 mph (104.25 km/h)
75 mph (120.7 km/h)69.4 mph (111.69 km/h)
80 mph (128.75 km/h)74.03 mph (119.14 km/h)
85 mph (136.79 km/h)78.66 mph (126.59 km/h)
90 mph (144.84 km/h)83.28 mph (134.03 km/h)
95 mph (152.89 km/h)87.91 mph (141.48 km/h)
100 mph (160.93 km/h)92.54 mph (148.93 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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