Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/75r16 vs 285/70r17 Tire Comparison Side By Side
  265/75-16 285/70-17 Difference
Diameter inches (mm) 31.65 (803.9) 32.71 (830.8) 1.06 (26.9) 3.3%
Width inches (mm) 10.43 (265) 11.22 (285) 0.79 (20) 7.5%
Circum. inches (mm) 99.43 (2525.53) 102.76 (2610.04) 3.33 (84.51) 3.3%
Sidewall Height inches (mm) 7.82 (198.75) 7.85 (199.5) 0.03 (0.75) 0.4%
Revolutions per mile (km) 637.23 (395.96) 616.6 (383.14) -20.63 (-12.82) -3.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.67 mph (33.26 km/h)
25 mph (40.23 km/h)25.84 mph (41.58 km/h)
30 mph (48.28 km/h)31 mph (49.9 km/h)
35 mph (56.33 km/h)36.17 mph (58.21 km/h)
40 mph (64.37 km/h)41.34 mph (66.53 km/h)
45 mph (72.42 km/h)46.51 mph (74.84 km/h)
50 mph (80.47 km/h)51.67 mph (83.16 km/h)
55 mph (88.51 km/h)56.84 mph (91.48 km/h)
60 mph (96.56 km/h)62.01 mph (99.79 km/h)
65 mph (104.61 km/h)67.18 mph (108.11 km/h)
70 mph (112.65 km/h)72.34 mph (116.42 km/h)
75 mph (120.7 km/h)77.51 mph (124.74 km/h)
80 mph (128.75 km/h)82.68 mph (133.06 km/h)
85 mph (136.79 km/h)87.84 mph (141.37 km/h)
90 mph (144.84 km/h)93.01 mph (149.69 km/h)
95 mph (152.89 km/h)98.18 mph (158 km/h)
100 mph (160.93 km/h)103.35 mph (166.32 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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