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Re: [oletrucks] Bolt circle

To: S Culver <sculver@mcleodusa.net>
Subject: Re: [oletrucks] Bolt circle
From: Andrew Roberts <arobs@u.washington.edu>
Date: Sat, 30 Mar 2002 14:14:14 -0800 (PST)
To find the distance between the centers of two adjacent bolts on a
circle, multiply the pattern diameter by the sine of half of the angle
between the bolts. Or:

c = d sin(180/n), where d is the diameter of the circle and n is the
number of bolts.

A 4-1/2" circle would have the bolts 4.5 * sin(36 deg) = 2.645" apart and
a 4-3/4" circlw would have adjacent bolts 2.792" apart.

-- 
Andrew Roberts
1949 3600
Buckley, WA

On Fri, 29 Mar 2002, S Culver wrote:

> Date: Fri, 29 Mar 2002 17:28:30 -0600
> From: S Culver <sculver@mcleodusa.net>
> To: oletrucks list <oletrucks@autox.team.net>
> Subject: [oletrucks] Bolt circle
>
> I'm about to order some Spyder Caps from Moon Eyes, and have a question.  How
> do I determine if my '58 Apache has a 4-1/2 or a 4-3/4 bolt circle?  Nothing
> that I have measured comes to exactly either measurement.  I have 15-inch
> 5-hole rims.
>
> Thanks!
>
> Smokey Culver
> League City, Texas
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959

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