Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/80r14 vs 185/60r14 Tire Comparison Side By Side
  135/80-14 185/60-14 Difference
Diameter inches (mm) 22.5 (571.6) 22.74 (577.6) 0.24 (6) 1%
Width inches (mm) 5.31 (135) 7.28 (185) 1.97 (50) 37%
Circum. inches (mm) 70.7 (1795.73) 71.44 (1814.58) 0.74 (18.85) 1%
Sidewall Height inches (mm) 4.25 (108) 4.37 (111) 0.12 (3) 2.8%
Revolutions per mile (km) 896.2 (556.87) 886.89 (551.09) -9.31 (-5.78) -1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.21 mph (32.52 km/h)
25 mph (40.23 km/h)25.26 mph (40.66 km/h)
30 mph (48.28 km/h)30.31 mph (48.79 km/h)
35 mph (56.33 km/h)35.37 mph (56.92 km/h)
40 mph (64.37 km/h)40.42 mph (65.05 km/h)
45 mph (72.42 km/h)45.47 mph (73.18 km/h)
50 mph (80.47 km/h)50.52 mph (81.31 km/h)
55 mph (88.51 km/h)55.58 mph (89.44 km/h)
60 mph (96.56 km/h)60.63 mph (97.57 km/h)
65 mph (104.61 km/h)65.68 mph (105.71 km/h)
70 mph (112.65 km/h)70.73 mph (113.84 km/h)
75 mph (120.7 km/h)75.79 mph (121.97 km/h)
80 mph (128.75 km/h)80.84 mph (130.1 km/h)
85 mph (136.79 km/h)85.89 mph (138.23 km/h)
90 mph (144.84 km/h)90.94 mph (146.36 km/h)
95 mph (152.89 km/h)96 mph (154.49 km/h)
100 mph (160.93 km/h)101.05 mph (162.62 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
22572622282429483083317932853409358237553947410143794687492750815167548459266886
Better Fuel Economy Factory Ratios Increased Power

Most Popular 135/80-R14 Comparisons

To Top