Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/80r14 vs 205/70r15 Tire Comparison Side By Side
  205/80-14 205/70-15 Difference
Diameter inches (mm) 26.91 (683.6) 26.3 (668) -0.61 (-15.6) -2.3%
Width inches (mm) 8.07 (205) 8.07 (205) 0 (0) 0%
Circum. inches (mm) 84.55 (2147.59) 82.62 (2098.58) -1.93 (-49.01) -2.3%
Sidewall Height inches (mm) 6.46 (164) 5.65 (143.5) -0.81 (-20.5) -12.5%
Revolutions per mile (km) 749.37 (465.64) 766.87 (476.51) 17.5 (10.87) 2.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.54 mph (31.45 km/h)
25 mph (40.23 km/h)24.43 mph (39.32 km/h)
30 mph (48.28 km/h)29.32 mph (47.18 km/h)
35 mph (56.33 km/h)34.2 mph (55.04 km/h)
40 mph (64.37 km/h)39.09 mph (62.9 km/h)
45 mph (72.42 km/h)43.97 mph (70.77 km/h)
50 mph (80.47 km/h)48.86 mph (78.63 km/h)
55 mph (88.51 km/h)53.74 mph (86.49 km/h)
60 mph (96.56 km/h)58.63 mph (94.36 km/h)
65 mph (104.61 km/h)63.52 mph (102.22 km/h)
70 mph (112.65 km/h)68.4 mph (110.08 km/h)
75 mph (120.7 km/h)73.29 mph (117.95 km/h)
80 mph (128.75 km/h)78.17 mph (125.81 km/h)
85 mph (136.79 km/h)83.06 mph (133.67 km/h)
90 mph (144.84 km/h)87.95 mph (141.54 km/h)
95 mph (152.89 km/h)92.83 mph (149.4 km/h)
100 mph (160.93 km/h)97.72 mph (157.26 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
19522267244225492666274928402948309832473413354637874053426043934468474251245954
Better Fuel Economy Factory Ratios Increased Power

Most Popular 205/80-R14 Comparisons

To Top