Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/65r17 vs 215/70r16 Tire Comparison Side By Side
  265/65-17 215/70-16 Difference
Diameter inches (mm) 30.56 (776.3) 27.85 (707.4) -2.71 (-68.9) -8.9%
Width inches (mm) 10.43 (265) 8.46 (215) -1.97 (-50) -18.9%
Circum. inches (mm) 96.02 (2438.82) 87.49 (2222.36) -8.52 (-216.46) -8.9%
Sidewall Height inches (mm) 6.78 (172.25) 5.93 (150.5) -0.86 (-21.75) -12.6%
Revolutions per mile (km) 659.89 (410.03) 724.16 (449.97) 64.27 (39.94) 9.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.22 mph (29.33 km/h)
25 mph (40.23 km/h)22.78 mph (36.66 km/h)
30 mph (48.28 km/h)27.34 mph (44 km/h)
35 mph (56.33 km/h)31.89 mph (51.33 km/h)
40 mph (64.37 km/h)36.45 mph (58.66 km/h)
45 mph (72.42 km/h)41.01 mph (65.99 km/h)
50 mph (80.47 km/h)45.56 mph (73.33 km/h)
55 mph (88.51 km/h)50.12 mph (80.66 km/h)
60 mph (96.56 km/h)54.67 mph (87.99 km/h)
65 mph (104.61 km/h)59.23 mph (95.32 km/h)
70 mph (112.65 km/h)63.79 mph (102.66 km/h)
75 mph (120.7 km/h)68.34 mph (109.99 km/h)
80 mph (128.75 km/h)72.9 mph (117.32 km/h)
85 mph (136.79 km/h)77.46 mph (124.65 km/h)
90 mph (144.84 km/h)82.01 mph (131.99 km/h)
95 mph (152.89 km/h)86.57 mph (139.32 km/h)
100 mph (160.93 km/h)91.12 mph (146.65 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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