Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/60r15 vs 28/10.5r15 Tire Comparison Side By Side
  265/60-15 28/10.5-15 Difference
Diameter inches (mm) 27.52 (699) 28.03 (712.08) 0.51 (13.08) 1.9%
Width inches (mm) 10.43 (265) 10.51 (267) 0.08 (2) 0.8%
Circum. inches (mm) 86.46 (2195.97) 88.07 (2237.07) 1.62 (41.09) 1.9%
Sidewall Height inches (mm) 6.26 (159) 6.52 (165.54) 0.26 (6.54) 4.1%
Revolutions per mile (km) 732.86 (455.38) 719.4 (447.01) -13.46 (-8.36) -1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.37 mph (32.79 km/h)
25 mph (40.23 km/h)25.47 mph (40.99 km/h)
30 mph (48.28 km/h)30.56 mph (49.18 km/h)
35 mph (56.33 km/h)35.65 mph (57.38 km/h)
40 mph (64.37 km/h)40.75 mph (65.58 km/h)
45 mph (72.42 km/h)45.84 mph (73.78 km/h)
50 mph (80.47 km/h)50.94 mph (81.97 km/h)
55 mph (88.51 km/h)56.03 mph (90.17 km/h)
60 mph (96.56 km/h)61.12 mph (98.37 km/h)
65 mph (104.61 km/h)66.22 mph (106.57 km/h)
70 mph (112.65 km/h)71.31 mph (114.76 km/h)
75 mph (120.7 km/h)76.4 mph (122.96 km/h)
80 mph (128.75 km/h)81.5 mph (131.16 km/h)
85 mph (136.79 km/h)86.59 mph (139.35 km/h)
90 mph (144.84 km/h)91.68 mph (147.55 km/h)
95 mph (152.89 km/h)96.78 mph (155.75 km/h)
100 mph (160.93 km/h)101.87 mph (163.95 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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