Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/65r16 vs 245/75r16 Tire Comparison Side By Side
  265/65-16 245/75-16 Difference
Diameter inches (mm) 29.56 (750.9) 30.47 (773.9) 0.91 (23) 3.1%
Width inches (mm) 10.43 (265) 9.65 (245) -0.79 (-20) -7.5%
Circum. inches (mm) 92.87 (2359.02) 95.72 (2431.28) 2.84 (72.26) 3.1%
Sidewall Height inches (mm) 6.78 (172.25) 7.23 (183.75) 0.45 (11.5) 6.7%
Revolutions per mile (km) 682.21 (423.9) 661.93 (411.31) -20.27 (-12.6) -3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.61 mph (33.17 km/h)
25 mph (40.23 km/h)25.77 mph (41.47 km/h)
30 mph (48.28 km/h)30.92 mph (49.76 km/h)
35 mph (56.33 km/h)36.07 mph (58.05 km/h)
40 mph (64.37 km/h)41.23 mph (66.35 km/h)
45 mph (72.42 km/h)46.38 mph (74.64 km/h)
50 mph (80.47 km/h)51.53 mph (82.93 km/h)
55 mph (88.51 km/h)56.68 mph (91.23 km/h)
60 mph (96.56 km/h)61.84 mph (99.52 km/h)
65 mph (104.61 km/h)66.99 mph (107.81 km/h)
70 mph (112.65 km/h)72.14 mph (116.1 km/h)
75 mph (120.7 km/h)77.3 mph (124.4 km/h)
80 mph (128.75 km/h)82.45 mph (132.69 km/h)
85 mph (136.79 km/h)87.6 mph (140.98 km/h)
90 mph (144.84 km/h)92.76 mph (149.28 km/h)
95 mph (152.89 km/h)97.91 mph (157.57 km/h)
100 mph (160.93 km/h)103.06 mph (165.86 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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