Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
145/80r14 vs 155/75r14 Tire Comparison Side By Side
  145/80-14 155/75-14 Difference
Diameter inches (mm) 23.13 (587.6) 23.15 (588.1) 0.02 (0.5) 0.1%
Width inches (mm) 5.71 (145) 6.1 (155) 0.39 (10) 6.9%
Circum. inches (mm) 72.68 (1846) 72.74 (1847.57) 0.06 (1.57) 0.1%
Sidewall Height inches (mm) 4.57 (116) 4.58 (116.25) 0.01 (0.25) 0.2%
Revolutions per mile (km) 871.8 (541.71) 871.06 (541.25) -0.74 (-0.46) -0.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.02 mph (32.21 km/h)
25 mph (40.23 km/h)25.02 mph (40.27 km/h)
30 mph (48.28 km/h)30.03 mph (48.32 km/h)
35 mph (56.33 km/h)35.03 mph (56.38 km/h)
40 mph (64.37 km/h)40.03 mph (64.43 km/h)
45 mph (72.42 km/h)45.04 mph (72.48 km/h)
50 mph (80.47 km/h)50.04 mph (80.54 km/h)
55 mph (88.51 km/h)55.05 mph (88.59 km/h)
60 mph (96.56 km/h)60.05 mph (96.64 km/h)
65 mph (104.61 km/h)65.06 mph (104.7 km/h)
70 mph (112.65 km/h)70.06 mph (112.75 km/h)
75 mph (120.7 km/h)75.06 mph (120.8 km/h)
80 mph (128.75 km/h)80.07 mph (128.86 km/h)
85 mph (136.79 km/h)85.07 mph (136.91 km/h)
90 mph (144.84 km/h)90.08 mph (144.96 km/h)
95 mph (152.89 km/h)95.08 mph (153.02 km/h)
100 mph (160.93 km/h)100.09 mph (161.07 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
22172575277328963028312232263349351836883877402843014603483949905075538658206763
Better Fuel Economy Factory Ratios Increased Power

Most Popular 145/80-R14 Comparisons

To Top