Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/65r14 vs 185/65r14 Tire Comparison Side By Side
  175/65-14 185/65-14 Difference
Diameter inches (mm) 22.96 (583.1) 23.47 (596.1) 0.51 (13) 2.2%
Width inches (mm) 6.89 (175) 7.28 (185) 0.39 (10) 5.7%
Circum. inches (mm) 72.12 (1831.86) 73.73 (1872.7) 1.61 (40.84) 2.2%
Sidewall Height inches (mm) 4.48 (113.75) 4.73 (120.25) 0.26 (6.5) 5.7%
Revolutions per mile (km) 878.53 (545.89) 859.37 (533.99) -19.16 (-11.91) -2.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.45 mph (32.9 km/h)
25 mph (40.23 km/h)25.56 mph (41.13 km/h)
30 mph (48.28 km/h)30.67 mph (49.36 km/h)
35 mph (56.33 km/h)35.78 mph (57.58 km/h)
40 mph (64.37 km/h)40.89 mph (65.81 km/h)
45 mph (72.42 km/h)46 mph (74.04 km/h)
50 mph (80.47 km/h)51.11 mph (82.26 km/h)
55 mph (88.51 km/h)56.23 mph (90.49 km/h)
60 mph (96.56 km/h)61.34 mph (98.71 km/h)
65 mph (104.61 km/h)66.45 mph (106.94 km/h)
70 mph (112.65 km/h)71.56 mph (115.17 km/h)
75 mph (120.7 km/h)76.67 mph (123.39 km/h)
80 mph (128.75 km/h)81.78 mph (131.62 km/h)
85 mph (136.79 km/h)86.9 mph (139.84 km/h)
90 mph (144.84 km/h)92.01 mph (148.07 km/h)
95 mph (152.89 km/h)97.12 mph (156.3 km/h)
100 mph (160.93 km/h)102.23 mph (164.52 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
21872541273628572987308031833304347136393825397442444541477449235007531457426672
Better Fuel Economy Factory Ratios Increased Power

Most Popular 175/65-R14 Comparisons

To Top