Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
155/70r17 vs 155/70r16 Tire Comparison Side By Side
  155/70-17 155/70-16 Difference
Diameter inches (mm) 25.54 (648.8) 24.54 (623.4) -1 (-25.4) -3.9%
Width inches (mm) 6.1 (155) 6.1 (155) 0 (0) 0%
Circum. inches (mm) 80.25 (2038.27) 77.11 (1958.47) -3.14 (-79.8) -3.9%
Sidewall Height inches (mm) 4.27 (108.5) 4.27 (108.5) 0 (0) 0%
Revolutions per mile (km) 789.57 (490.61) 821.74 (510.6) 32.17 (19.99) 4.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.22 mph (30.93 km/h)
25 mph (40.23 km/h)24.02 mph (38.66 km/h)
30 mph (48.28 km/h)28.83 mph (46.39 km/h)
35 mph (56.33 km/h)33.63 mph (54.12 km/h)
40 mph (64.37 km/h)38.43 mph (61.85 km/h)
45 mph (72.42 km/h)43.24 mph (69.59 km/h)
50 mph (80.47 km/h)48.04 mph (77.32 km/h)
55 mph (88.51 km/h)52.85 mph (85.05 km/h)
60 mph (96.56 km/h)57.65 mph (92.78 km/h)
65 mph (104.61 km/h)62.46 mph (100.51 km/h)
70 mph (112.65 km/h)67.26 mph (108.24 km/h)
75 mph (120.7 km/h)72.06 mph (115.98 km/h)
80 mph (128.75 km/h)76.87 mph (123.71 km/h)
85 mph (136.79 km/h)81.67 mph (131.44 km/h)
90 mph (144.84 km/h)86.48 mph (139.17 km/h)
95 mph (152.89 km/h)91.28 mph (146.9 km/h)
100 mph (160.93 km/h)96.09 mph (154.63 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
20912429261627322856294530433159331934793657380040584342456547074787508154906380
Better Fuel Economy Factory Ratios Increased Power

Most Popular 155/70-R17 Comparisons

To Top