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 165/60r15 Tire Comparison Side By Side
  145/80-14 165/60-15 Difference
Diameter inches (mm) 23.13 (587.6) 22.8 (579) -0.34 (-8.6) -1.5%
Width inches (mm) 5.71 (145) 6.5 (165) 0.79 (20) 13.8%
Circum. inches (mm) 72.68 (1846) 71.61 (1818.98) -1.06 (-27.02) -1.5%
Sidewall Height inches (mm) 4.57 (116) 3.9 (99) -0.67 (-17) -14.7%
Revolutions per mile (km) 871.8 (541.71) 884.75 (549.76) 12.95 (8.05) 1.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.71 mph (31.72 km/h)
25 mph (40.23 km/h)24.63 mph (39.64 km/h)
30 mph (48.28 km/h)29.56 mph (47.57 km/h)
35 mph (56.33 km/h)34.49 mph (55.5 km/h)
40 mph (64.37 km/h)39.41 mph (63.43 km/h)
45 mph (72.42 km/h)44.34 mph (71.36 km/h)
50 mph (80.47 km/h)49.27 mph (79.29 km/h)
55 mph (88.51 km/h)54.2 mph (87.22 km/h)
60 mph (96.56 km/h)59.12 mph (95.15 km/h)
65 mph (104.61 km/h)64.05 mph (103.08 km/h)
70 mph (112.65 km/h)68.98 mph (111.01 km/h)
75 mph (120.7 km/h)73.9 mph (118.93 km/h)
80 mph (128.75 km/h)78.83 mph (126.86 km/h)
85 mph (136.79 km/h)83.76 mph (134.79 km/h)
90 mph (144.84 km/h)88.68 mph (142.72 km/h)
95 mph (152.89 km/h)93.61 mph (150.65 km/h)
100 mph (160.93 km/h)98.54 mph (158.58 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
22522616281729413075317132773401357437463938409143694675491550685155547159116870
Better Fuel Economy Factory Ratios Increased Power

Most Popular 145/80-R14 Comparisons

To Top