Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/65r16 vs 255/65r16 Tire Comparison Side By Side
  245/65-16 255/65-16 Difference
Diameter inches (mm) 28.54 (724.9) 29.05 (737.9) 0.51 (13) 1.8%
Width inches (mm) 9.65 (245) 10.04 (255) 0.39 (10) 4.1%
Circum. inches (mm) 89.66 (2277.34) 91.27 (2318.18) 1.61 (40.84) 1.8%
Sidewall Height inches (mm) 6.27 (159.25) 6.53 (165.75) 0.26 (6.5) 4.1%
Revolutions per mile (km) 706.68 (439.11) 694.23 (431.37) -12.45 (-7.74) -1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.36 mph (32.76 km/h)
25 mph (40.23 km/h)25.45 mph (40.96 km/h)
30 mph (48.28 km/h)30.54 mph (49.15 km/h)
35 mph (56.33 km/h)35.63 mph (57.34 km/h)
40 mph (64.37 km/h)40.72 mph (65.53 km/h)
45 mph (72.42 km/h)45.81 mph (73.72 km/h)
50 mph (80.47 km/h)50.9 mph (81.91 km/h)
55 mph (88.51 km/h)55.99 mph (90.1 km/h)
60 mph (96.56 km/h)61.08 mph (98.29 km/h)
65 mph (104.61 km/h)66.17 mph (106.48 km/h)
70 mph (112.65 km/h)71.26 mph (114.67 km/h)
75 mph (120.7 km/h)76.35 mph (122.87 km/h)
80 mph (128.75 km/h)81.43 mph (131.06 km/h)
85 mph (136.79 km/h)86.52 mph (139.25 km/h)
90 mph (144.84 km/h)91.61 mph (147.44 km/h)
95 mph (152.89 km/h)96.7 mph (155.63 km/h)
100 mph (160.93 km/h)101.79 mph (163.82 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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