Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/65r16 vs 265/75r16 Tire Comparison Side By Side
  245/65-16 265/75-16 Difference
Diameter inches (mm) 28.54 (724.9) 31.65 (803.9) 3.11 (79) 10.9%
Width inches (mm) 9.65 (245) 10.43 (265) 0.79 (20) 8.2%
Circum. inches (mm) 89.66 (2277.34) 99.43 (2525.53) 9.77 (248.19) 10.9%
Sidewall Height inches (mm) 6.27 (159.25) 7.82 (198.75) 1.56 (39.5) 24.8%
Revolutions per mile (km) 706.68 (439.11) 637.23 (395.96) -69.45 (-43.15) -9.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.18 mph (35.69 km/h)
25 mph (40.23 km/h)27.72 mph (44.62 km/h)
30 mph (48.28 km/h)33.27 mph (53.54 km/h)
35 mph (56.33 km/h)38.81 mph (62.47 km/h)
40 mph (64.37 km/h)44.36 mph (71.39 km/h)
45 mph (72.42 km/h)49.9 mph (80.31 km/h)
50 mph (80.47 km/h)55.45 mph (89.24 km/h)
55 mph (88.51 km/h)60.99 mph (98.16 km/h)
60 mph (96.56 km/h)66.54 mph (107.08 km/h)
65 mph (104.61 km/h)72.08 mph (116.01 km/h)
70 mph (112.65 km/h)77.63 mph (124.93 km/h)
75 mph (120.7 km/h)83.17 mph (133.86 km/h)
80 mph (128.75 km/h)88.72 mph (142.78 km/h)
85 mph (136.79 km/h)94.26 mph (151.7 km/h)
90 mph (144.84 km/h)99.81 mph (160.63 km/h)
95 mph (152.89 km/h)105.35 mph (169.55 km/h)
100 mph (160.93 km/h)110.9 mph (178.47 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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