Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/75r14 vs 165/85r14 Tire Comparison Side By Side
  165/75-14 165/85-14 Difference
Diameter inches (mm) 23.74 (603.1) 25.04 (636.1) 1.3 (33) 5.5%
Width inches (mm) 6.5 (165) 6.5 (165) 0 (0) 0%
Circum. inches (mm) 74.59 (1894.69) 78.68 (1998.37) 4.08 (103.67) 5.5%
Sidewall Height inches (mm) 4.87 (123.75) 5.52 (140.25) 0.65 (16.5) 13.3%
Revolutions per mile (km) 849.39 (527.79) 805.33 (500.41) -44.07 (-27.38) -5.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.09 mph (33.95 km/h)
25 mph (40.23 km/h)26.37 mph (42.44 km/h)
30 mph (48.28 km/h)31.64 mph (50.92 km/h)
35 mph (56.33 km/h)36.92 mph (59.41 km/h)
40 mph (64.37 km/h)42.19 mph (67.9 km/h)
45 mph (72.42 km/h)47.46 mph (76.38 km/h)
50 mph (80.47 km/h)52.74 mph (84.87 km/h)
55 mph (88.51 km/h)58.01 mph (93.36 km/h)
60 mph (96.56 km/h)63.28 mph (101.84 km/h)
65 mph (104.61 km/h)68.56 mph (110.33 km/h)
70 mph (112.65 km/h)73.83 mph (118.82 km/h)
75 mph (120.7 km/h)79.1 mph (127.31 km/h)
80 mph (128.75 km/h)84.38 mph (135.79 km/h)
85 mph (136.79 km/h)89.65 mph (144.28 km/h)
90 mph (144.84 km/h)94.92 mph (152.77 km/h)
95 mph (152.89 km/h)100.2 mph (161.25 km/h)
100 mph (160.93 km/h)105.47 mph (169.74 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
20492381256426772799288729833096325334103584372439774256447446134692498053816253
Better Fuel Economy Factory Ratios Increased Power

Most Popular 165/75-R14 Comparisons

To Top