Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/65r14 vs 175/65r14 Tire Comparison Side By Side
  185/65-14 175/65-14 Difference
Diameter inches (mm) 23.47 (596.1) 22.96 (583.1) -0.51 (-13) -2.2%
Width inches (mm) 7.28 (185) 6.89 (175) -0.39 (-10) -5.4%
Circum. inches (mm) 73.73 (1872.7) 72.12 (1831.86) -1.61 (-40.84) -2.2%
Sidewall Height inches (mm) 4.73 (120.25) 4.48 (113.75) -0.26 (-6.5) -5.4%
Revolutions per mile (km) 859.37 (533.99) 878.53 (545.89) 19.16 (11.91) 2.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.56 mph (31.48 km/h)
25 mph (40.23 km/h)24.45 mph (39.36 km/h)
30 mph (48.28 km/h)29.35 mph (47.23 km/h)
35 mph (56.33 km/h)34.24 mph (55.1 km/h)
40 mph (64.37 km/h)39.13 mph (62.97 km/h)
45 mph (72.42 km/h)44.02 mph (70.84 km/h)
50 mph (80.47 km/h)48.91 mph (78.71 km/h)
55 mph (88.51 km/h)53.8 mph (86.58 km/h)
60 mph (96.56 km/h)58.69 mph (94.45 km/h)
65 mph (104.61 km/h)63.58 mph (102.33 km/h)
70 mph (112.65 km/h)68.47 mph (110.2 km/h)
75 mph (120.7 km/h)73.36 mph (118.07 km/h)
80 mph (128.75 km/h)78.26 mph (125.94 km/h)
85 mph (136.79 km/h)83.15 mph (133.81 km/h)
90 mph (144.84 km/h)88.04 mph (141.68 km/h)
95 mph (152.89 km/h)92.93 mph (149.55 km/h)
100 mph (160.93 km/h)97.82 mph (157.42 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 185/65-R14 Comparisons

To Top