Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/75r15 vs 265/75r16 Tire Comparison Side By Side
  225/75-15 265/75-16 Difference
Diameter inches (mm) 28.29 (718.5) 31.65 (803.9) 3.36 (85.4) 11.9%
Width inches (mm) 8.86 (225) 10.43 (265) 1.57 (40) 17.8%
Circum. inches (mm) 88.87 (2257.23) 99.43 (2525.53) 10.56 (268.29) 11.9%
Sidewall Height inches (mm) 6.64 (168.75) 7.82 (198.75) 1.18 (30) 17.8%
Revolutions per mile (km) 712.97 (443.02) 637.23 (395.96) -75.74 (-47.06) -10.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.38 mph (36.01 km/h)
25 mph (40.23 km/h)27.97 mph (45.02 km/h)
30 mph (48.28 km/h)33.57 mph (54.02 km/h)
35 mph (56.33 km/h)39.16 mph (63.02 km/h)
40 mph (64.37 km/h)44.75 mph (72.03 km/h)
45 mph (72.42 km/h)50.35 mph (81.03 km/h)
50 mph (80.47 km/h)55.94 mph (90.03 km/h)
55 mph (88.51 km/h)61.54 mph (99.03 km/h)
60 mph (96.56 km/h)67.13 mph (108.04 km/h)
65 mph (104.61 km/h)72.73 mph (117.04 km/h)
70 mph (112.65 km/h)78.32 mph (126.04 km/h)
75 mph (120.7 km/h)83.91 mph (135.05 km/h)
80 mph (128.75 km/h)89.51 mph (144.05 km/h)
85 mph (136.79 km/h)95.1 mph (153.05 km/h)
90 mph (144.84 km/h)100.7 mph (162.06 km/h)
95 mph (152.89 km/h)106.29 mph (171.06 km/h)
100 mph (160.93 km/h)111.89 mph (180.06 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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