Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/55r17 vs 265/65r17 Tire Comparison Side By Side
  255/55-17 265/65-17 Difference
Diameter inches (mm) 28.04 (712.3) 30.56 (776.3) 2.52 (64) 9%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 88.1 (2237.76) 96.02 (2438.82) 7.92 (201.06) 9%
Sidewall Height inches (mm) 5.52 (140.25) 6.78 (172.25) 1.26 (32) 22.8%
Revolutions per mile (km) 719.18 (446.88) 659.89 (410.03) -59.29 (-36.84) -8.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.8 mph (35.08 km/h)
25 mph (40.23 km/h)27.25 mph (43.85 km/h)
30 mph (48.28 km/h)32.7 mph (52.62 km/h)
35 mph (56.33 km/h)38.14 mph (61.39 km/h)
40 mph (64.37 km/h)43.59 mph (70.16 km/h)
45 mph (72.42 km/h)49.04 mph (78.93 km/h)
50 mph (80.47 km/h)54.49 mph (87.7 km/h)
55 mph (88.51 km/h)59.94 mph (96.47 km/h)
60 mph (96.56 km/h)65.39 mph (105.24 km/h)
65 mph (104.61 km/h)70.84 mph (114.01 km/h)
70 mph (112.65 km/h)76.29 mph (122.78 km/h)
75 mph (120.7 km/h)81.74 mph (131.55 km/h)
80 mph (128.75 km/h)87.19 mph (140.32 km/h)
85 mph (136.79 km/h)92.64 mph (149.09 km/h)
90 mph (144.84 km/h)98.09 mph (157.86 km/h)
95 mph (152.89 km/h)103.54 mph (166.62 km/h)
100 mph (160.93 km/h)108.98 mph (175.39 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
16791951210121942294236524442537266527942937305132593487366637803844408044095124
Better Fuel Economy Factory Ratios Increased Power

Most Popular 255/55-R17 Comparisons

To Top