Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/60r18 vs 245/70r16 Tire Comparison Side By Side
  265/60-18 245/70-16 Difference
Diameter inches (mm) 30.52 (775.2) 29.5 (749.4) -1.02 (-25.8) -3.3%
Width inches (mm) 10.43 (265) 9.65 (245) -0.79 (-20) -7.5%
Circum. inches (mm) 95.88 (2435.36) 92.69 (2354.31) -3.19 (-81.05) -3.3%
Sidewall Height inches (mm) 6.26 (159) 6.75 (171.5) 0.49 (12.5) 7.9%
Revolutions per mile (km) 660.82 (410.62) 683.57 (424.75) 22.75 (14.14) 3.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.33 mph (31.12 km/h)
25 mph (40.23 km/h)24.17 mph (38.89 km/h)
30 mph (48.28 km/h)29 mph (46.67 km/h)
35 mph (56.33 km/h)33.84 mph (54.45 km/h)
40 mph (64.37 km/h)38.67 mph (62.23 km/h)
45 mph (72.42 km/h)43.5 mph (70.01 km/h)
50 mph (80.47 km/h)48.34 mph (77.79 km/h)
55 mph (88.51 km/h)53.17 mph (85.57 km/h)
60 mph (96.56 km/h)58 mph (93.35 km/h)
65 mph (104.61 km/h)62.84 mph (101.13 km/h)
70 mph (112.65 km/h)67.67 mph (108.9 km/h)
75 mph (120.7 km/h)72.5 mph (116.68 km/h)
80 mph (128.75 km/h)77.34 mph (124.46 km/h)
85 mph (136.79 km/h)82.17 mph (132.24 km/h)
90 mph (144.84 km/h)87 mph (140.02 km/h)
95 mph (152.89 km/h)91.84 mph (147.8 km/h)
100 mph (160.93 km/h)96.67 mph (155.58 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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