Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/50r14 vs 205/30r14 Tire Comparison Side By Side
  205/50-14 205/30-14 Difference
Diameter inches (mm) 22.07 (560.6) 18.84 (478.6) -3.23 (-82) -14.6%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 69.34 (1761.18) 59.2 (1503.57) -10.14 (-257.61) -14.6%
Sidewall Height inches (mm) 4.04 (102.5) 2.42 (61.5) -1.61 (-41) -40%
Revolutions per mile (km) 913.79 (567.8) 1070.35 (665.08) 156.56 (97.28) 17.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.07 mph (27.48 km/h)
25 mph (40.23 km/h)21.34 mph (34.35 km/h)
30 mph (48.28 km/h)25.61 mph (41.22 km/h)
35 mph (56.33 km/h)29.88 mph (48.09 km/h)
40 mph (64.37 km/h)34.15 mph (54.96 km/h)
45 mph (72.42 km/h)38.42 mph (61.83 km/h)
50 mph (80.47 km/h)42.69 mph (68.7 km/h)
55 mph (88.51 km/h)46.96 mph (75.57 km/h)
60 mph (96.56 km/h)51.22 mph (82.44 km/h)
65 mph (104.61 km/h)55.49 mph (89.31 km/h)
70 mph (112.65 km/h)59.76 mph (96.18 km/h)
75 mph (120.7 km/h)64.03 mph (103.05 km/h)
80 mph (128.75 km/h)68.3 mph (109.92 km/h)
85 mph (136.79 km/h)72.57 mph (116.79 km/h)
90 mph (144.84 km/h)76.84 mph (123.66 km/h)
95 mph (152.89 km/h)81.1 mph (130.52 km/h)
100 mph (160.93 km/h)85.37 mph (137.39 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Better Fuel Economy Factory Ratios Increased Power

Most Popular 205/50-R14 Comparisons

To Top