Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/80r14 vs 265/80r14 Tire Comparison Side By Side
  215/80-14 265/80-14 Difference
Diameter inches (mm) 27.54 (699.6) 30.69 (779.6) 3.15 (80) 11.4%
Width inches (mm) 8.46 (215) 10.43 (265) 1.97 (50) 23.3%
Circum. inches (mm) 86.53 (2197.86) 96.42 (2449.19) 9.89 (251.33) 11.4%
Sidewall Height inches (mm) 6.77 (172) 8.35 (212) 1.57 (40) 23.3%
Revolutions per mile (km) 732.23 (454.99) 657.09 (408.3) -75.14 (-46.69) -10.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.29 mph (35.87 km/h)
25 mph (40.23 km/h)27.86 mph (44.83 km/h)
30 mph (48.28 km/h)33.43 mph (53.8 km/h)
35 mph (56.33 km/h)39 mph (62.77 km/h)
40 mph (64.37 km/h)44.57 mph (71.74 km/h)
45 mph (72.42 km/h)50.15 mph (80.7 km/h)
50 mph (80.47 km/h)55.72 mph (89.67 km/h)
55 mph (88.51 km/h)61.29 mph (98.64 km/h)
60 mph (96.56 km/h)66.86 mph (107.6 km/h)
65 mph (104.61 km/h)72.43 mph (116.57 km/h)
70 mph (112.65 km/h)78 mph (125.54 km/h)
75 mph (120.7 km/h)83.58 mph (134.5 km/h)
80 mph (128.75 km/h)89.15 mph (143.47 km/h)
85 mph (136.79 km/h)94.72 mph (152.44 km/h)
90 mph (144.84 km/h)100.29 mph (161.4 km/h)
95 mph (152.89 km/h)105.86 mph (170.37 km/h)
100 mph (160.93 km/h)111.44 mph (179.34 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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