Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
27/8.5r15 vs 195/75r14 Tire Comparison Side By Side
  27/8.5-15 195/75-14 Difference
Diameter inches (mm) 27.08 (687.72) 25.52 (648.1) -1.56 (-39.62) -5.8%
Width inches (mm) 8.5 (216) 7.68 (195) -0.83 (-21) -9.7%
Circum. inches (mm) 85.06 (2160.54) 80.16 (2036.07) -4.9 (-124.47) -5.8%
Sidewall Height inches (mm) 6.04 (153.36) 5.76 (146.25) -0.28 (-7.11) -4.6%
Revolutions per mile (km) 744.88 (462.85) 790.42 (491.14) 45.54 (28.3) 6.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.85 mph (30.33 km/h)
25 mph (40.23 km/h)23.56 mph (37.92 km/h)
30 mph (48.28 km/h)28.27 mph (45.5 km/h)
35 mph (56.33 km/h)32.98 mph (53.08 km/h)
40 mph (64.37 km/h)37.7 mph (60.67 km/h)
45 mph (72.42 km/h)42.41 mph (68.25 km/h)
50 mph (80.47 km/h)47.12 mph (75.83 km/h)
55 mph (88.51 km/h)51.83 mph (83.41 km/h)
60 mph (96.56 km/h)56.54 mph (91 km/h)
65 mph (104.61 km/h)61.26 mph (98.58 km/h)
70 mph (112.65 km/h)65.97 mph (106.16 km/h)
75 mph (120.7 km/h)70.68 mph (113.75 km/h)
80 mph (128.75 km/h)75.39 mph (121.33 km/h)
85 mph (136.79 km/h)80.1 mph (128.91 km/h)
90 mph (144.84 km/h)84.82 mph (136.5 km/h)
95 mph (152.89 km/h)89.53 mph (144.08 km/h)
100 mph (160.93 km/h)94.24 mph (151.66 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
20112337251626282748283329273039319333473518365539034177439145284605488752816137
Better Fuel Economy Factory Ratios Increased Power

Most Popular 27/8.5-R15 Comparisons

To Top