Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/65r16 vs 265/70r16 Tire Comparison Side By Side
  265/65-16 265/70-16 Difference
Diameter inches (mm) 29.56 (750.9) 30.61 (777.4) 1.04 (26.5) 3.5%
Width inches (mm) 10.43 (265) 10.43 (265) 0 (0) 0%
Circum. inches (mm) 92.87 (2359.02) 96.15 (2442.27) 3.28 (83.25) 3.5%
Sidewall Height inches (mm) 6.78 (172.25) 7.3 (185.5) 0.52 (13.25) 7.7%
Revolutions per mile (km) 682.21 (423.9) 658.95 (409.45) -23.26 (-14.45) -3.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.71 mph (33.32 km/h)
25 mph (40.23 km/h)25.88 mph (41.65 km/h)
30 mph (48.28 km/h)31.06 mph (49.98 km/h)
35 mph (56.33 km/h)36.24 mph (58.31 km/h)
40 mph (64.37 km/h)41.41 mph (66.65 km/h)
45 mph (72.42 km/h)46.59 mph (74.98 km/h)
50 mph (80.47 km/h)51.76 mph (83.31 km/h)
55 mph (88.51 km/h)56.94 mph (91.64 km/h)
60 mph (96.56 km/h)62.12 mph (99.97 km/h)
65 mph (104.61 km/h)67.29 mph (108.3 km/h)
70 mph (112.65 km/h)72.47 mph (116.63 km/h)
75 mph (120.7 km/h)77.65 mph (124.96 km/h)
80 mph (128.75 km/h)82.82 mph (133.29 km/h)
85 mph (136.79 km/h)88 mph (141.62 km/h)
90 mph (144.84 km/h)93.18 mph (149.95 km/h)
95 mph (152.89 km/h)98.35 mph (158.28 km/h)
100 mph (160.93 km/h)103.53 mph (166.61 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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