Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/65r16 vs 245/75r16 Tire Comparison Side By Side
  235/65-16 245/75-16 Difference
Diameter inches (mm) 28.03 (711.9) 30.47 (773.9) 2.44 (62) 8.7%
Width inches (mm) 9.25 (235) 9.65 (245) 0.39 (10) 4.3%
Circum. inches (mm) 88.05 (2236.5) 95.72 (2431.28) 7.67 (194.78) 8.7%
Sidewall Height inches (mm) 6.01 (152.75) 7.23 (183.75) 1.22 (31) 20.3%
Revolutions per mile (km) 719.58 (447.13) 661.93 (411.31) -57.65 (-35.82) -8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.74 mph (34.99 km/h)
25 mph (40.23 km/h)27.18 mph (43.74 km/h)
30 mph (48.28 km/h)32.61 mph (52.49 km/h)
35 mph (56.33 km/h)38.05 mph (61.23 km/h)
40 mph (64.37 km/h)43.48 mph (69.98 km/h)
45 mph (72.42 km/h)48.92 mph (78.73 km/h)
50 mph (80.47 km/h)54.35 mph (87.48 km/h)
55 mph (88.51 km/h)59.79 mph (96.22 km/h)
60 mph (96.56 km/h)65.23 mph (104.97 km/h)
65 mph (104.61 km/h)70.66 mph (113.72 km/h)
70 mph (112.65 km/h)76.1 mph (122.47 km/h)
75 mph (120.7 km/h)81.53 mph (131.21 km/h)
80 mph (128.75 km/h)86.97 mph (139.96 km/h)
85 mph (136.79 km/h)92.4 mph (148.71 km/h)
90 mph (144.84 km/h)97.84 mph (157.46 km/h)
95 mph (152.89 km/h)103.27 mph (166.2 km/h)
100 mph (160.93 km/h)108.71 mph (174.95 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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