Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/65r16 vs 265/75r16 Tire Comparison Side By Side
  255/65-16 265/75-16 Difference
Diameter inches (mm) 29.05 (737.9) 31.65 (803.9) 2.6 (66) 8.9%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 91.27 (2318.18) 99.43 (2525.53) 8.16 (207.35) 8.9%
Sidewall Height inches (mm) 6.53 (165.75) 7.82 (198.75) 1.3 (33) 19.9%
Revolutions per mile (km) 694.23 (431.37) 637.23 (395.96) -57 (-35.42) -8.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.79 mph (35.07 km/h)
25 mph (40.23 km/h)27.24 mph (43.83 km/h)
30 mph (48.28 km/h)32.68 mph (52.6 km/h)
35 mph (56.33 km/h)38.13 mph (61.37 km/h)
40 mph (64.37 km/h)43.58 mph (70.13 km/h)
45 mph (72.42 km/h)49.02 mph (78.9 km/h)
50 mph (80.47 km/h)54.47 mph (87.66 km/h)
55 mph (88.51 km/h)59.92 mph (96.43 km/h)
60 mph (96.56 km/h)65.37 mph (105.2 km/h)
65 mph (104.61 km/h)70.81 mph (113.96 km/h)
70 mph (112.65 km/h)76.26 mph (122.73 km/h)
75 mph (120.7 km/h)81.71 mph (131.5 km/h)
80 mph (128.75 km/h)87.16 mph (140.26 km/h)
85 mph (136.79 km/h)92.6 mph (149.03 km/h)
90 mph (144.84 km/h)98.05 mph (157.8 km/h)
95 mph (152.89 km/h)103.5 mph (166.56 km/h)
100 mph (160.93 km/h)108.94 mph (175.33 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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