Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
155/65r14 vs 175/65r14 Tire Comparison Side By Side
  155/65-14 175/65-14 Difference
Diameter inches (mm) 21.93 (557.1) 22.96 (583.1) 1.02 (26) 4.7%
Width inches (mm) 6.1 (155) 6.89 (175) 0.79 (20) 12.9%
Circum. inches (mm) 68.9 (1750.18) 72.12 (1831.86) 3.22 (81.68) 4.7%
Sidewall Height inches (mm) 3.97 (100.75) 4.48 (113.75) 0.51 (13) 12.9%
Revolutions per mile (km) 919.53 (571.37) 878.53 (545.89) -41 (-25.48) -4.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.93 mph (33.69 km/h)
25 mph (40.23 km/h)26.17 mph (42.11 km/h)
30 mph (48.28 km/h)31.4 mph (50.53 km/h)
35 mph (56.33 km/h)36.63 mph (58.96 km/h)
40 mph (64.37 km/h)41.87 mph (67.38 km/h)
45 mph (72.42 km/h)47.1 mph (75.8 km/h)
50 mph (80.47 km/h)52.33 mph (84.22 km/h)
55 mph (88.51 km/h)57.57 mph (92.65 km/h)
60 mph (96.56 km/h)62.8 mph (101.07 km/h)
65 mph (104.61 km/h)68.03 mph (109.49 km/h)
70 mph (112.65 km/h)73.27 mph (117.91 km/h)
75 mph (120.7 km/h)78.5 mph (126.33 km/h)
80 mph (128.75 km/h)83.73 mph (134.76 km/h)
85 mph (136.79 km/h)88.97 mph (143.18 km/h)
90 mph (144.84 km/h)94.2 mph (151.6 km/h)
95 mph (152.89 km/h)99.43 mph (160.02 km/h)
100 mph (160.93 km/h)104.67 mph (168.45 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
22362597279729213054314932543377354937203910406243384643488050335118543258706821
Better Fuel Economy Factory Ratios Increased Power

Most Popular 155/65-R14 Comparisons

To Top