Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/80r17 vs 285/75r17 Tire Comparison Side By Side
  235/80-17 285/75-17 Difference
Diameter inches (mm) 31.8 (807.8) 33.83 (859.3) 2.03 (51.5) 6.4%
Width inches (mm) 9.25 (235) 11.22 (285) 1.97 (50) 21.3%
Circum. inches (mm) 99.91 (2537.78) 106.28 (2699.57) 6.37 (161.79) 6.4%
Sidewall Height inches (mm) 7.4 (188) 8.42 (213.75) 1.01 (25.75) 13.7%
Revolutions per mile (km) 634.15 (394.04) 596.15 (370.43) -38.01 (-23.62) -6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.28 mph (34.24 km/h)
25 mph (40.23 km/h)26.59 mph (42.8 km/h)
30 mph (48.28 km/h)31.91 mph (51.36 km/h)
35 mph (56.33 km/h)37.23 mph (59.92 km/h)
40 mph (64.37 km/h)42.55 mph (68.48 km/h)
45 mph (72.42 km/h)47.87 mph (77.04 km/h)
50 mph (80.47 km/h)53.19 mph (85.6 km/h)
55 mph (88.51 km/h)58.51 mph (94.16 km/h)
60 mph (96.56 km/h)63.83 mph (102.72 km/h)
65 mph (104.61 km/h)69.14 mph (111.28 km/h)
70 mph (112.65 km/h)74.46 mph (119.84 km/h)
75 mph (120.7 km/h)79.78 mph (128.4 km/h)
80 mph (128.75 km/h)85.1 mph (136.96 km/h)
85 mph (136.79 km/h)90.42 mph (145.52 km/h)
90 mph (144.84 km/h)95.74 mph (154.08 km/h)
95 mph (152.89 km/h)101.06 mph (162.64 km/h)
100 mph (160.93 km/h)106.38 mph (171.19 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
15171762189819822072213722082292240825242653275729443150331234153473368639834629
Better Fuel Economy Factory Ratios Increased Power

Most Popular 235/80-R17 Comparisons

To Top