Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/75r15 vs 225/75r15 Tire Comparison Side By Side
  275/75-15 225/75-15 Difference
Diameter inches (mm) 31.24 (793.5) 28.29 (718.5) -2.95 (-75) -9.5%
Width inches (mm) 10.83 (275) 8.86 (225) -1.97 (-50) -18.2%
Circum. inches (mm) 98.14 (2492.85) 88.87 (2257.23) -9.28 (-235.62) -9.5%
Sidewall Height inches (mm) 8.12 (206.25) 6.64 (168.75) -1.48 (-37.5) -18.2%
Revolutions per mile (km) 645.58 (401.15) 712.97 (443.02) 67.39 (41.87) 10.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.11 mph (29.14 km/h)
25 mph (40.23 km/h)22.64 mph (36.43 km/h)
30 mph (48.28 km/h)27.16 mph (43.72 km/h)
35 mph (56.33 km/h)31.69 mph (51 km/h)
40 mph (64.37 km/h)36.22 mph (58.29 km/h)
45 mph (72.42 km/h)40.75 mph (65.58 km/h)
50 mph (80.47 km/h)45.27 mph (72.86 km/h)
55 mph (88.51 km/h)49.8 mph (80.15 km/h)
60 mph (96.56 km/h)54.33 mph (87.43 km/h)
65 mph (104.61 km/h)58.86 mph (94.72 km/h)
70 mph (112.65 km/h)63.38 mph (102.01 km/h)
75 mph (120.7 km/h)67.91 mph (109.29 km/h)
80 mph (128.75 km/h)72.44 mph (116.58 km/h)
85 mph (136.79 km/h)76.97 mph (123.86 km/h)
90 mph (144.84 km/h)81.49 mph (131.15 km/h)
95 mph (152.89 km/h)86.02 mph (138.44 km/h)
100 mph (160.93 km/h)90.55 mph (145.72 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
18142108227023702478255626402741288030193173329735213768396140844154440947645536
Better Fuel Economy Factory Ratios Increased Power

Most Popular 275/75-R15 Comparisons

To Top