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 235/70r16 Tire Comparison Side By Side
  245/65-16 235/70-16 Difference
Diameter inches (mm) 28.54 (724.9) 28.95 (735.4) 0.41 (10.5) 1.4%
Width inches (mm) 9.65 (245) 9.25 (235) -0.39 (-10) -4.1%
Circum. inches (mm) 89.66 (2277.34) 90.96 (2310.33) 1.3 (32.99) 1.4%
Sidewall Height inches (mm) 6.27 (159.25) 6.48 (164.5) 0.21 (5.25) 3.3%
Revolutions per mile (km) 706.68 (439.11) 696.59 (432.84) -10.09 (-6.27) -1.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.29 mph (32.65 km/h)
25 mph (40.23 km/h)25.36 mph (40.82 km/h)
30 mph (48.28 km/h)30.43 mph (48.98 km/h)
35 mph (56.33 km/h)35.51 mph (57.14 km/h)
40 mph (64.37 km/h)40.58 mph (65.31 km/h)
45 mph (72.42 km/h)45.65 mph (73.47 km/h)
50 mph (80.47 km/h)50.72 mph (81.63 km/h)
55 mph (88.51 km/h)55.8 mph (89.8 km/h)
60 mph (96.56 km/h)60.87 mph (97.96 km/h)
65 mph (104.61 km/h)65.94 mph (106.12 km/h)
70 mph (112.65 km/h)71.01 mph (114.29 km/h)
75 mph (120.7 km/h)76.09 mph (122.45 km/h)
80 mph (128.75 km/h)81.16 mph (130.61 km/h)
85 mph (136.79 km/h)86.23 mph (138.78 km/h)
90 mph (144.84 km/h)91.3 mph (146.94 km/h)
95 mph (152.89 km/h)96.38 mph (155.1 km/h)
100 mph (160.93 km/h)101.45 mph (163.27 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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