Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/65r16 vs 285/70r17 Tire Comparison Side By Side
  265/65-16 285/70-17 Difference
Diameter inches (mm) 29.56 (750.9) 32.71 (830.8) 3.15 (79.9) 10.6%
Width inches (mm) 10.43 (265) 11.22 (285) 0.79 (20) 7.5%
Circum. inches (mm) 92.87 (2359.02) 102.76 (2610.04) 9.88 (251.01) 10.6%
Sidewall Height inches (mm) 6.78 (172.25) 7.85 (199.5) 1.07 (27.25) 15.8%
Revolutions per mile (km) 682.21 (423.9) 616.6 (383.14) -65.61 (-40.77) -9.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.13 mph (35.61 km/h)
25 mph (40.23 km/h)27.66 mph (44.51 km/h)
30 mph (48.28 km/h)33.19 mph (53.42 km/h)
35 mph (56.33 km/h)38.72 mph (62.32 km/h)
40 mph (64.37 km/h)44.26 mph (71.22 km/h)
45 mph (72.42 km/h)49.79 mph (80.13 km/h)
50 mph (80.47 km/h)55.32 mph (89.03 km/h)
55 mph (88.51 km/h)60.85 mph (97.93 km/h)
60 mph (96.56 km/h)66.38 mph (106.84 km/h)
65 mph (104.61 km/h)71.92 mph (115.74 km/h)
70 mph (112.65 km/h)77.45 mph (124.64 km/h)
75 mph (120.7 km/h)82.98 mph (133.54 km/h)
80 mph (128.75 km/h)88.51 mph (142.45 km/h)
85 mph (136.79 km/h)94.04 mph (151.35 km/h)
90 mph (144.84 km/h)99.58 mph (160.25 km/h)
95 mph (152.89 km/h)105.11 mph (169.16 km/h)
100 mph (160.93 km/h)110.64 mph (178.06 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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