Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/75r15 vs 235/80r16 Tire Comparison Side By Side
  225/75-15 235/80-16 Difference
Diameter inches (mm) 28.29 (718.5) 30.8 (782.4) 2.52 (63.9) 8.9%
Width inches (mm) 8.86 (225) 9.25 (235) 0.39 (10) 4.4%
Circum. inches (mm) 88.87 (2257.23) 96.77 (2457.98) 7.9 (200.75) 8.9%
Sidewall Height inches (mm) 6.64 (168.75) 7.4 (188) 0.76 (19.25) 11.4%
Revolutions per mile (km) 712.97 (443.02) 654.74 (406.84) -58.23 (-36.18) -8.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.78 mph (35.05 km/h)
25 mph (40.23 km/h)27.22 mph (43.81 km/h)
30 mph (48.28 km/h)32.67 mph (52.57 km/h)
35 mph (56.33 km/h)38.11 mph (61.34 km/h)
40 mph (64.37 km/h)43.56 mph (70.1 km/h)
45 mph (72.42 km/h)49 mph (78.86 km/h)
50 mph (80.47 km/h)54.45 mph (87.62 km/h)
55 mph (88.51 km/h)59.89 mph (96.39 km/h)
60 mph (96.56 km/h)65.34 mph (105.15 km/h)
65 mph (104.61 km/h)70.78 mph (113.91 km/h)
70 mph (112.65 km/h)76.23 mph (122.67 km/h)
75 mph (120.7 km/h)81.67 mph (131.44 km/h)
80 mph (128.75 km/h)87.11 mph (140.2 km/h)
85 mph (136.79 km/h)92.56 mph (148.96 km/h)
90 mph (144.84 km/h)98 mph (157.72 km/h)
95 mph (152.89 km/h)103.45 mph (166.49 km/h)
100 mph (160.93 km/h)108.89 mph (175.25 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
16661936208521772276234724252517264527722914302832333460363737513815404843755084
Better Fuel Economy Factory Ratios Increased Power

Most Popular 225/75-R15 Comparisons

To Top