Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
32/10.5r16 vs 245/75r16 Tire Comparison Side By Side
  32/10.5-16 245/75-16 Difference
Diameter inches (mm) 31.98 (812.24) 30.47 (773.9) -1.51 (-38.34) -4.7%
Width inches (mm) 10.51 (267) 9.65 (245) -0.87 (-22) -8.2%
Circum. inches (mm) 100.46 (2551.73) 95.72 (2431.28) -4.74 (-120.45) -4.7%
Sidewall Height inches (mm) 7.99 (202.92) 7.23 (183.75) -0.75 (-19.17) -9.4%
Revolutions per mile (km) 630.69 (391.89) 661.93 (411.31) 31.25 (19.41) 5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.06 mph (30.67 km/h)
25 mph (40.23 km/h)23.82 mph (38.33 km/h)
30 mph (48.28 km/h)28.58 mph (46 km/h)
35 mph (56.33 km/h)33.35 mph (53.67 km/h)
40 mph (64.37 km/h)38.11 mph (61.34 km/h)
45 mph (72.42 km/h)42.88 mph (69 km/h)
50 mph (80.47 km/h)47.64 mph (76.67 km/h)
55 mph (88.51 km/h)52.4 mph (84.34 km/h)
60 mph (96.56 km/h)57.17 mph (92 km/h)
65 mph (104.61 km/h)61.93 mph (99.67 km/h)
70 mph (112.65 km/h)66.7 mph (107.34 km/h)
75 mph (120.7 km/h)71.46 mph (115 km/h)
80 mph (128.75 km/h)76.22 mph (122.67 km/h)
85 mph (136.79 km/h)80.99 mph (130.34 km/h)
90 mph (144.84 km/h)85.75 mph (138 km/h)
95 mph (152.89 km/h)90.52 mph (145.67 km/h)
100 mph (160.93 km/h)95.28 mph (153.34 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
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