Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/65r17 vs 265/65r18 Tire Comparison Side By Side
  265/65-17 265/65-18 Difference
Diameter inches (mm) 30.56 (776.3) 31.56 (801.7) 1 (25.4) 3.3%
Width inches (mm) 10.43 (265) 10.43 (265) 0 (0) 0%
Circum. inches (mm) 96.02 (2438.82) 99.16 (2518.61) 3.14 (79.8) 3.3%
Sidewall Height inches (mm) 6.78 (172.25) 6.78 (172.25) 0 (0) 0%
Revolutions per mile (km) 659.89 (410.03) 638.98 (397.04) -20.91 (-12.99) -3.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.65 mph (33.24 km/h)
25 mph (40.23 km/h)25.82 mph (41.55 km/h)
30 mph (48.28 km/h)30.98 mph (49.86 km/h)
35 mph (56.33 km/h)36.15 mph (58.17 km/h)
40 mph (64.37 km/h)41.31 mph (66.48 km/h)
45 mph (72.42 km/h)46.47 mph (74.79 km/h)
50 mph (80.47 km/h)51.64 mph (83.1 km/h)
55 mph (88.51 km/h)56.8 mph (91.41 km/h)
60 mph (96.56 km/h)61.96 mph (99.72 km/h)
65 mph (104.61 km/h)67.13 mph (108.03 km/h)
70 mph (112.65 km/h)72.29 mph (116.34 km/h)
75 mph (120.7 km/h)77.45 mph (124.65 km/h)
80 mph (128.75 km/h)82.62 mph (132.96 km/h)
85 mph (136.79 km/h)87.78 mph (141.27 km/h)
90 mph (144.84 km/h)92.94 mph (149.58 km/h)
95 mph (152.89 km/h)98.11 mph (157.89 km/h)
100 mph (160.93 km/h)103.27 mph (166.2 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
16261889203421242221229023662456258127062844295531553377355036603723395142694961
Better Fuel Economy Factory Ratios Increased Power

Most Popular 265/65-R17 Comparisons

To Top