Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/35r18 vs 265/45r18 Tire Comparison Side By Side
  265/35-18 265/45-18 Difference
Diameter inches (mm) 25.3 (642.7) 27.39 (695.7) 2.09 (53) 8.2%
Width inches (mm) 10.43 (265) 10.43 (265) 0 (0) 0%
Circum. inches (mm) 79.49 (2019.1) 86.05 (2185.61) 6.56 (166.5) 8.2%
Sidewall Height inches (mm) 3.65 (92.75) 4.69 (119.25) 1.04 (26.5) 28.6%
Revolutions per mile (km) 797.06 (495.27) 736.34 (457.54) -60.72 (-37.73) -7.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.65 mph (34.84 km/h)
25 mph (40.23 km/h)27.06 mph (43.55 km/h)
30 mph (48.28 km/h)32.47 mph (52.26 km/h)
35 mph (56.33 km/h)37.89 mph (60.97 km/h)
40 mph (64.37 km/h)43.3 mph (69.68 km/h)
45 mph (72.42 km/h)48.71 mph (78.39 km/h)
50 mph (80.47 km/h)54.12 mph (87.1 km/h)
55 mph (88.51 km/h)59.54 mph (95.81 km/h)
60 mph (96.56 km/h)64.95 mph (104.52 km/h)
65 mph (104.61 km/h)70.36 mph (113.23 km/h)
70 mph (112.65 km/h)75.77 mph (121.94 km/h)
75 mph (120.7 km/h)81.18 mph (130.65 km/h)
80 mph (128.75 km/h)86.6 mph (139.36 km/h)
85 mph (136.79 km/h)92.01 mph (148.08 km/h)
90 mph (144.84 km/h)97.42 mph (156.79 km/h)
95 mph (152.89 km/h)102.83 mph (165.5 km/h)
100 mph (160.93 km/h)108.25 mph (174.21 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
18742177234424482560263927272831297431183277340536363891409142184290455349205717
Better Fuel Economy Factory Ratios Increased Power

Most Popular 265/35-R18 Comparisons

To Top