Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/55r16 vs 265/55r16 Tire Comparison Side By Side
  255/55-16 265/55-16 Difference
Diameter inches (mm) 27.04 (686.9) 27.48 (697.9) 0.43 (11) 1.6%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 84.96 (2157.96) 86.32 (2192.52) 1.36 (34.56) 1.6%
Sidewall Height inches (mm) 5.52 (140.25) 5.74 (145.75) 0.22 (5.5) 3.9%
Revolutions per mile (km) 745.77 (463.4) 734.02 (456.1) -11.75 (-7.3) -1.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.32 mph (32.7 km/h)
25 mph (40.23 km/h)25.4 mph (40.88 km/h)
30 mph (48.28 km/h)30.48 mph (49.05 km/h)
35 mph (56.33 km/h)35.56 mph (57.23 km/h)
40 mph (64.37 km/h)40.64 mph (65.4 km/h)
45 mph (72.42 km/h)45.72 mph (73.58 km/h)
50 mph (80.47 km/h)50.8 mph (81.76 km/h)
55 mph (88.51 km/h)55.88 mph (89.93 km/h)
60 mph (96.56 km/h)60.96 mph (98.11 km/h)
65 mph (104.61 km/h)66.04 mph (106.28 km/h)
70 mph (112.65 km/h)71.12 mph (114.46 km/h)
75 mph (120.7 km/h)76.2 mph (122.63 km/h)
80 mph (128.75 km/h)81.28 mph (130.81 km/h)
85 mph (136.79 km/h)86.36 mph (138.99 km/h)
90 mph (144.84 km/h)91.44 mph (147.16 km/h)
95 mph (152.89 km/h)96.52 mph (155.34 km/h)
100 mph (160.93 km/h)101.6 mph (163.51 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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