Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/55r16 vs 265/70r16 Tire Comparison Side By Side
  205/55-16 265/70-16 Difference
Diameter inches (mm) 24.88 (631.9) 30.61 (777.4) 5.73 (145.5) 23%
Width inches (mm) 8.07 (205) 10.43 (265) 2.36 (60) 29.3%
Circum. inches (mm) 78.16 (1985.17) 96.15 (2442.27) 18 (457.1) 23%
Sidewall Height inches (mm) 4.44 (112.75) 7.3 (185.5) 2.86 (72.75) 64.5%
Revolutions per mile (km) 810.68 (503.73) 658.95 (409.45) -151.73 (-94.28) -18.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)24.61 mph (39.6 km/h)
25 mph (40.23 km/h)30.76 mph (49.5 km/h)
30 mph (48.28 km/h)36.91 mph (59.4 km/h)
35 mph (56.33 km/h)43.06 mph (69.3 km/h)
40 mph (64.37 km/h)49.21 mph (79.2 km/h)
45 mph (72.42 km/h)55.36 mph (89.1 km/h)
50 mph (80.47 km/h)61.51 mph (99 km/h)
55 mph (88.51 km/h)67.66 mph (108.9 km/h)
60 mph (96.56 km/h)73.82 mph (118.79 km/h)
65 mph (104.61 km/h)79.97 mph (128.69 km/h)
70 mph (112.65 km/h)86.12 mph (138.59 km/h)
75 mph (120.7 km/h)92.27 mph (148.49 km/h)
80 mph (128.75 km/h)98.42 mph (158.39 km/h)
85 mph (136.79 km/h)104.57 mph (168.29 km/h)
90 mph (144.84 km/h)110.72 mph (178.19 km/h)
95 mph (152.89 km/h)116.87 mph (188.09 km/h)
100 mph (160.93 km/h)123.03 mph (197.99 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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