Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r17 vs 265/70r16 Tire Comparison Side By Side
  265/70-17 265/70-16 Difference
Diameter inches (mm) 31.61 (802.8) 30.61 (777.4) -1 (-25.4) -3.2%
Width inches (mm) 10.43 (265) 10.43 (265) 0 (0) 0%
Circum. inches (mm) 99.29 (2522.07) 96.15 (2442.27) -3.14 (-79.8) -3.2%
Sidewall Height inches (mm) 7.3 (185.5) 7.3 (185.5) 0 (0) 0%
Revolutions per mile (km) 638.1 (396.5) 658.95 (409.45) 20.85 (12.95) 3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.37 mph (31.17 km/h)
25 mph (40.23 km/h)24.21 mph (38.96 km/h)
30 mph (48.28 km/h)29.05 mph (46.75 km/h)
35 mph (56.33 km/h)33.89 mph (54.54 km/h)
40 mph (64.37 km/h)38.73 mph (62.34 km/h)
45 mph (72.42 km/h)43.58 mph (70.13 km/h)
50 mph (80.47 km/h)48.42 mph (77.92 km/h)
55 mph (88.51 km/h)53.26 mph (85.71 km/h)
60 mph (96.56 km/h)58.1 mph (93.51 km/h)
65 mph (104.61 km/h)62.94 mph (101.3 km/h)
70 mph (112.65 km/h)67.79 mph (109.09 km/h)
75 mph (120.7 km/h)72.63 mph (116.88 km/h)
80 mph (128.75 km/h)77.47 mph (124.67 km/h)
85 mph (136.79 km/h)82.31 mph (132.47 km/h)
90 mph (144.84 km/h)87.15 mph (140.26 km/h)
95 mph (152.89 km/h)91.99 mph (148.05 km/h)
100 mph (160.93 km/h)96.84 mph (155.84 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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