Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/70r16 vs 285/70r17 Tire Comparison Side By Side
  275/70-16 285/70-17 Difference
Diameter inches (mm) 31.16 (791.4) 32.71 (830.8) 1.55 (39.4) 5%
Width inches (mm) 10.83 (275) 11.22 (285) 0.39 (10) 3.6%
Circum. inches (mm) 97.88 (2486.26) 102.76 (2610.04) 4.87 (123.78) 5%
Sidewall Height inches (mm) 7.58 (192.5) 7.85 (199.5) 0.28 (7) 3.6%
Revolutions per mile (km) 647.3 (402.21) 616.6 (383.14) -30.7 (-19.07) -4.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21 mph (33.79 km/h)
25 mph (40.23 km/h)26.24 mph (42.24 km/h)
30 mph (48.28 km/h)31.49 mph (50.68 km/h)
35 mph (56.33 km/h)36.74 mph (59.13 km/h)
40 mph (64.37 km/h)41.99 mph (67.58 km/h)
45 mph (72.42 km/h)47.24 mph (76.03 km/h)
50 mph (80.47 km/h)52.49 mph (84.47 km/h)
55 mph (88.51 km/h)57.74 mph (92.92 km/h)
60 mph (96.56 km/h)62.99 mph (101.37 km/h)
65 mph (104.61 km/h)68.24 mph (109.82 km/h)
70 mph (112.65 km/h)73.48 mph (118.26 km/h)
75 mph (120.7 km/h)78.73 mph (126.71 km/h)
80 mph (128.75 km/h)83.98 mph (135.16 km/h)
85 mph (136.79 km/h)89.23 mph (143.6 km/h)
90 mph (144.84 km/h)94.48 mph (152.05 km/h)
95 mph (152.89 km/h)99.73 mph (160.5 km/h)
100 mph (160.93 km/h)104.98 mph (168.95 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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