Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/55r16 vs 125/70r18 Tire Comparison Side By Side
  205/55-16 125/70-18 Difference
Diameter inches (mm) 24.88 (631.9) 24.89 (632.2) 0.01 (0.3) 0%
Width inches (mm) 8.07 (205) 4.92 (125) -3.15 (-80) -39%
Circum. inches (mm) 78.16 (1985.17) 78.19 (1986.11) 0.04 (0.94) 0%
Sidewall Height inches (mm) 4.44 (112.75) 3.44 (87.5) -0.99 (-25.25) -22.4%
Revolutions per mile (km) 810.68 (503.73) 810.3 (503.49) -0.38 (-0.24) -0%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.01 mph (32.2 km/h)
25 mph (40.23 km/h)25.01 mph (40.25 km/h)
30 mph (48.28 km/h)30.01 mph (48.3 km/h)
35 mph (56.33 km/h)35.02 mph (56.35 km/h)
40 mph (64.37 km/h)40.02 mph (64.4 km/h)
45 mph (72.42 km/h)45.02 mph (72.46 km/h)
50 mph (80.47 km/h)50.02 mph (80.51 km/h)
55 mph (88.51 km/h)55.03 mph (88.56 km/h)
60 mph (96.56 km/h)60.03 mph (96.61 km/h)
65 mph (104.61 km/h)65.03 mph (104.66 km/h)
70 mph (112.65 km/h)70.03 mph (112.71 km/h)
75 mph (120.7 km/h)75.04 mph (120.76 km/h)
80 mph (128.75 km/h)80.04 mph (128.81 km/h)
85 mph (136.79 km/h)85.04 mph (136.86 km/h)
90 mph (144.84 km/h)90.04 mph (144.91 km/h)
95 mph (152.89 km/h)95.05 mph (152.96 km/h)
100 mph (160.93 km/h)100.05 mph (161.01 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
20622395258026942817290430013115327334313606374740014282450146424721501054146291
Better Fuel Economy Factory Ratios Increased Power

Most Popular 205/55-R16 Comparisons

To Top