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 285/75r17 Tire Comparison Side By Side
  265/65-17 285/75-17 Difference
Diameter inches (mm) 30.56 (776.3) 33.83 (859.3) 3.27 (83) 10.7%
Width inches (mm) 10.43 (265) 11.22 (285) 0.79 (20) 7.5%
Circum. inches (mm) 96.02 (2438.82) 106.28 (2699.57) 10.27 (260.75) 10.7%
Sidewall Height inches (mm) 6.78 (172.25) 8.42 (213.75) 1.63 (41.5) 24.1%
Revolutions per mile (km) 659.89 (410.03) 596.15 (370.43) -63.74 (-39.61) -9.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.14 mph (35.63 km/h)
25 mph (40.23 km/h)27.67 mph (44.54 km/h)
30 mph (48.28 km/h)33.21 mph (53.44 km/h)
35 mph (56.33 km/h)38.74 mph (62.35 km/h)
40 mph (64.37 km/h)44.28 mph (71.26 km/h)
45 mph (72.42 km/h)49.81 mph (80.16 km/h)
50 mph (80.47 km/h)55.35 mph (89.07 km/h)
55 mph (88.51 km/h)60.88 mph (97.98 km/h)
60 mph (96.56 km/h)66.42 mph (106.88 km/h)
65 mph (104.61 km/h)71.95 mph (115.79 km/h)
70 mph (112.65 km/h)77.48 mph (124.7 km/h)
75 mph (120.7 km/h)83.02 mph (133.61 km/h)
80 mph (128.75 km/h)88.55 mph (142.51 km/h)
85 mph (136.79 km/h)94.09 mph (151.42 km/h)
90 mph (144.84 km/h)99.62 mph (160.33 km/h)
95 mph (152.89 km/h)105.16 mph (169.23 km/h)
100 mph (160.93 km/h)110.69 mph (178.14 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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