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 195/45r15 Tire Comparison Side By Side
  145/80-10 195/45-15 Difference
Diameter inches (mm) 19.13 (486) 21.91 (556.5) 2.78 (70.5) 14.5%
Width inches (mm) 5.71 (145) 7.68 (195) 1.97 (50) 34.5%
Circum. inches (mm) 60.11 (1526.81) 68.83 (1748.3) 8.72 (221.48) 14.5%
Sidewall Height inches (mm) 4.57 (116) 3.45 (87.75) -1.11 (-28.25) -24.4%
Revolutions per mile (km) 1054.05 (654.96) 920.52 (571.98) -133.53 (-82.97) -12.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.9 mph (36.86 km/h)
25 mph (40.23 km/h)28.63 mph (46.07 km/h)
30 mph (48.28 km/h)34.35 mph (55.28 km/h)
35 mph (56.33 km/h)40.08 mph (64.5 km/h)
40 mph (64.37 km/h)45.8 mph (73.71 km/h)
45 mph (72.42 km/h)51.53 mph (82.93 km/h)
50 mph (80.47 km/h)57.25 mph (92.14 km/h)
55 mph (88.51 km/h)62.98 mph (101.35 km/h)
60 mph (96.56 km/h)68.7 mph (110.57 km/h)
65 mph (104.61 km/h)74.43 mph (119.78 km/h)
70 mph (112.65 km/h)80.15 mph (129 km/h)
75 mph (120.7 km/h)85.88 mph (138.21 km/h)
80 mph (128.75 km/h)91.6 mph (147.42 km/h)
85 mph (136.79 km/h)97.33 mph (156.64 km/h)
90 mph (144.84 km/h)103.06 mph (165.85 km/h)
95 mph (152.89 km/h)108.78 mph (175.07 km/h)
100 mph (160.93 km/h)114.51 mph (184.28 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