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Kirkham Motorsports

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  #1 (permalink)  
Old 06-16-2003, 05:04 PM
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Default 275 60 BFG`s

hi
It may seem stupid to ask but how tall 27 or 28" is a 275 60 15 goodrich?

thanks
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Old 06-16-2003, 05:28 PM
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The O.D. is 27.5 inches according to the specs I've seen.
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Old 06-16-2003, 05:41 PM
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Cool The tire calculator at SmokeMUP.com..

says they are 27.99".

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Old 06-16-2003, 05:51 PM
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My BFG Charts says:

Rim width range - 7.0 - 11.00
Overall diameter - 28.0
Tread width - 8.9
Section width on measuring rim width** - 11" on 8" rim

** Section width varies approximately 0.2" for every 0.5"
change in rim width
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Old 06-16-2003, 06:12 PM
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Thanks guys....
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Old 06-17-2003, 04:38 PM
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(275 mm wide x 60% aspect ratio) x 2 = 12.99" + 15" for rim = 28"
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Old 07-05-2003, 08:35 AM
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My calculations:

275 X .6 = 165 millimeters is side wall height (aspect ratio is the relationship between the tread width and the side wall height)

Multiply millimeters by .039 to get inches : .039 X 165 = 6.435 inches. Multiply by 2 to get both side wall heights (top and bottom of tire): 6.435 X 2 = 12.87

Add this to the 15" wheel diameter: 15 + 12.87 = 27.87 inches


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Old 07-05-2003, 08:41 AM
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I was just looking this up yesterday - take a look at the attached chart from the Tire Rack....

http://www.tirerack.com/tires/Spec.j...l=Radial+T%2FA
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Old 07-07-2003, 05:58 AM
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Default they actually measure 27.125

inflated and mounted on steel rims...they are for sale (new) under for sale items
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Old 07-26-2003, 09:59 PM
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27 1/8 th.. someone has been doing burnouts
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Old 07-26-2003, 10:15 PM
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The rolling circumference is 84.5 inches on my SPF with 20 PSI air pressure.

Bob
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