Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
32/11.5r15 vs 285/75r16 Tire Comparison Side By Side
  32/11.5-15 285/75-16 Difference
Diameter inches (mm) 32.01 (813.16) 32.83 (833.9) 0.82 (20.74) 2.6%
Width inches (mm) 11.5 (292) 11.22 (285) -0.28 (-7) -2.4%
Circum. inches (mm) 100.58 (2554.62) 103.14 (2619.77) 2.57 (65.16) 2.6%
Sidewall Height inches (mm) 8.51 (216.08) 8.42 (213.75) -0.09 (-2.33) -1.1%
Revolutions per mile (km) 629.97 (391.45) 614.31 (381.71) -15.67 (-9.74) -2.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.51 mph (33.01 km/h)
25 mph (40.23 km/h)25.64 mph (41.26 km/h)
30 mph (48.28 km/h)30.77 mph (49.51 km/h)
35 mph (56.33 km/h)35.89 mph (57.76 km/h)
40 mph (64.37 km/h)41.02 mph (66.02 km/h)
45 mph (72.42 km/h)46.15 mph (74.27 km/h)
50 mph (80.47 km/h)51.28 mph (82.52 km/h)
55 mph (88.51 km/h)56.4 mph (90.77 km/h)
60 mph (96.56 km/h)61.53 mph (99.02 km/h)
65 mph (104.61 km/h)66.66 mph (107.28 km/h)
70 mph (112.65 km/h)71.79 mph (115.53 km/h)
75 mph (120.7 km/h)76.91 mph (123.78 km/h)
80 mph (128.75 km/h)82.04 mph (132.03 km/h)
85 mph (136.79 km/h)87.17 mph (140.28 km/h)
90 mph (144.84 km/h)92.3 mph (148.54 km/h)
95 mph (152.89 km/h)97.42 mph (156.79 km/h)
100 mph (160.93 km/h)102.55 mph (165.04 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
15631816195620422135220222752362248126012734284130333246341335193579379841044770
Better Fuel Economy Factory Ratios Increased Power

Most Popular 32/11.5-R15 Comparisons

To Top