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 245/65r17 Tire Comparison Side By Side
  265/65-17 245/65-17 Difference
Diameter inches (mm) 30.56 (776.3) 29.54 (750.3) -1.02 (-26) -3.3%
Width inches (mm) 10.43 (265) 9.65 (245) -0.79 (-20) -7.5%
Circum. inches (mm) 96.02 (2438.82) 92.8 (2357.14) -3.22 (-81.68) -3.3%
Sidewall Height inches (mm) 6.78 (172.25) 6.27 (159.25) -0.51 (-13) -7.5%
Revolutions per mile (km) 659.89 (410.03) 682.75 (424.24) 22.87 (14.21) 3.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.33 mph (31.11 km/h)
25 mph (40.23 km/h)24.16 mph (38.89 km/h)
30 mph (48.28 km/h)29 mph (46.66 km/h)
35 mph (56.33 km/h)33.83 mph (54.44 km/h)
40 mph (64.37 km/h)38.66 mph (62.22 km/h)
45 mph (72.42 km/h)43.49 mph (70 km/h)
50 mph (80.47 km/h)48.33 mph (77.77 km/h)
55 mph (88.51 km/h)53.16 mph (85.55 km/h)
60 mph (96.56 km/h)57.99 mph (93.33 km/h)
65 mph (104.61 km/h)62.82 mph (101.1 km/h)
70 mph (112.65 km/h)67.66 mph (108.88 km/h)
75 mph (120.7 km/h)72.49 mph (116.66 km/h)
80 mph (128.75 km/h)77.32 mph (124.44 km/h)
85 mph (136.79 km/h)82.15 mph (132.21 km/h)
90 mph (144.84 km/h)86.99 mph (139.99 km/h)
95 mph (152.89 km/h)91.82 mph (147.77 km/h)
100 mph (160.93 km/h)96.65 mph (155.54 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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