Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
145/80r10 vs 155/60r12 Tire Comparison Side By Side
  145/80-10 155/60-12 Difference
Diameter inches (mm) 19.13 (486) 19.32 (490.8) 0.19 (4.8) 1%
Width inches (mm) 5.71 (145) 6.1 (155) 0.39 (10) 6.9%
Circum. inches (mm) 60.11 (1526.81) 60.7 (1541.89) 0.59 (15.08) 1%
Sidewall Height inches (mm) 4.57 (116) 3.66 (93) -0.91 (-23) -19.8%
Revolutions per mile (km) 1054.05 (654.96) 1043.75 (648.55) -10.31 (-6.41) -1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.2 mph (32.5 km/h)
25 mph (40.23 km/h)25.25 mph (40.63 km/h)
30 mph (48.28 km/h)30.3 mph (48.76 km/h)
35 mph (56.33 km/h)35.35 mph (56.88 km/h)
40 mph (64.37 km/h)40.4 mph (65.01 km/h)
45 mph (72.42 km/h)45.44 mph (73.14 km/h)
50 mph (80.47 km/h)50.49 mph (81.26 km/h)
55 mph (88.51 km/h)55.54 mph (89.39 km/h)
60 mph (96.56 km/h)60.59 mph (97.51 km/h)
65 mph (104.61 km/h)65.64 mph (105.64 km/h)
70 mph (112.65 km/h)70.69 mph (113.77 km/h)
75 mph (120.7 km/h)75.74 mph (121.89 km/h)
80 mph (128.75 km/h)80.79 mph (130.02 km/h)
85 mph (136.79 km/h)85.84 mph (138.15 km/h)
90 mph (144.84 km/h)90.89 mph (146.27 km/h)
95 mph (152.89 km/h)95.94 mph (154.4 km/h)
100 mph (160.93 km/h)100.99 mph (162.52 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 145/80-R10 Comparisons

To Top