Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/75r18 vs 265/70r18 Tire Comparison Side By Side
  265/75-18 265/70-18 Difference
Diameter inches (mm) 33.65 (854.7) 32.61 (828.2) -1.04 (-26.5) -3.1%
Width inches (mm) 10.43 (265) 10.43 (265) 0 (0) 0%
Circum. inches (mm) 105.71 (2685.12) 102.44 (2601.87) -3.28 (-83.25) -3.1%
Sidewall Height inches (mm) 7.82 (198.75) 7.3 (185.5) -0.52 (-13.25) -6.7%
Revolutions per mile (km) 599.36 (372.42) 618.53 (384.34) 19.18 (11.92) 3.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.38 mph (31.19 km/h)
25 mph (40.23 km/h)24.22 mph (38.99 km/h)
30 mph (48.28 km/h)29.07 mph (46.78 km/h)
35 mph (56.33 km/h)33.91 mph (54.58 km/h)
40 mph (64.37 km/h)38.76 mph (62.38 km/h)
45 mph (72.42 km/h)43.6 mph (70.18 km/h)
50 mph (80.47 km/h)48.45 mph (77.97 km/h)
55 mph (88.51 km/h)53.29 mph (85.77 km/h)
60 mph (96.56 km/h)58.14 mph (93.57 km/h)
65 mph (104.61 km/h)62.98 mph (101.36 km/h)
70 mph (112.65 km/h)67.83 mph (109.16 km/h)
75 mph (120.7 km/h)72.67 mph (116.96 km/h)
80 mph (128.75 km/h)77.52 mph (124.76 km/h)
85 mph (136.79 km/h)82.36 mph (132.55 km/h)
90 mph (144.84 km/h)87.21 mph (140.35 km/h)
95 mph (152.89 km/h)92.05 mph (148.15 km/h)
100 mph (160.93 km/h)96.9 mph (155.94 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
15741829196920562150221722912378249826192753286030543269343635433604382541334803
Better Fuel Economy Factory Ratios Increased Power

Most Popular 265/75-R18 Comparisons

To Top