[FC] Not one, not two, but THREE rim sizes for FCs!!!!
Merv Krull and or Loretta Prosser
corvanatics@corvair.org
Mon Jan 31 01:16:01 2005
Thanx James... you bet I got the point... and the rest of your information
is truly excellent. My point is that the system is rather confusing (but not
impossible) to deal with. That system is crucial when considering switching
to a different wheel.... it must have the same offset or it will mess up all
the geometry that was designed into a vehicle. For determining a correct rim
when presented with the options I was given, I think most folks would use
the simpler system. Both systems work fine, but I like to cheat.... <S>
Thanx again!
Merv Krull
Salmon Arm, BC
----- Original Message -----
From: "James Davis" <jld@wk.net>
To: <corvanatics@corvair.org>
Sent: Saturday, January 29, 2005 3:29 PM
Subject: Re: [FC] Not one, not two, but THREE rim sizes for FCs!!!!
> You missed the point. Rim width is measured where the tire sits not
> outside. The stock width is 5 inches, bead to bead. I know of no other
> size. The 62, 63 ,64 supplements show no other rim widths for the FC and
> the 65 shop manual does not have FC specifications. Since the FC wheels
> were unique to the FC, it is possible that when originals were damaged or
> someone wanted wider wheels the "A" body car or station wagon wheels were
> substituted. "A" bodied six cylinder cars came with 5 inch wide rims, V-8
> with 5.5 inches, and station wagons came with 6 inch wide rims as a
> general rule. The early "A" had 13 inch diameter wheels but with disk
> brakes they all had 14 inch or larger rims. You could specify a
> different tire size and also different diameters for the "A" bodied cars
> but all FC's came with 7.00 x 14 tires in either 4 or 6 ply rating. The
> short answer is any rim over 5 inches in width is not an original FC rim
> per the shop manual.
> Jim Davis
>
> At 01:45 PM 1/29/2005, you wrote:
>>.... which clearly demonstrates why I used the measurements I gave....
>><BFCEG>.. ;-)
>>Merv Krull
>>
>>----- Original Message ----- From: "James Davis" <jld@wk.net>
>>To: <corvanatics@corvair.org>
>>Sent: Saturday, January 29, 2005 9:58 AM
>>Subject: Re: [FC] Not one, not two, but THREE rim sizes for FCs!!!!
>>
>>
>>>First all rims are measured in width at the tire bead. From the 61 Shop
>>>manual page #12-3:
>>>Wheels
>>>Type --------------------------------Short spoke, disk
>>>Attachment to hub ----------------5 studs, 7/16-20
>>>Offset-------------------------------0.560 in
>>>Rim size ----------------------------14 x 5j mod.
>>>
>>>Offset is positive thus the back space is 2.5 (half of the width) plus
>>>the offset or 3.06 inches.
>>>The rims are quite unique looking as the depression in the rim is toward
>>>the back edge. This is why the tire must be mounted and removed from the
>>>back side of the rims. Need a picture?
>>>Jim Davis
>>>
>>>
>>>
>>>At 12:16 AM 1/29/2005, you wrote:
>>>>Hi all!
>>>>
>>>>Actually, maybe only one correct size for FCs, but since all these rims
>>>>came
>>>>from FCs, it may be reasonable to assume that there are actually three
>>>>(or
>>>>more?) rim sizes. A true FC rim can be distinguished from a regular
>>>>Chevy rim
>>>>quite easily.... the regular Chevy rims have a ridge where a full size
>>>>hupcap
>>>>would fit and FC rims do not.
>>>>
>>>>This is what I have found:
>>>>
>>>>Rim A 7 inches outside to outside, 3 3/4 inch backset, 2 5/8 inch
>>>>frontset
>>>>
>>>>Rim B 6 3/8 inch outside to outside, 3 3/4 inch backset, 2 1/8 inch
>>>>frontset
>>>>
>>>>Rim C 5 15/16 inch outside to outside, 3 1/2 inch backset, 1 15/16
>>>>inch
>>>>frontset
>>>>
>>>>*outside to outside in the measure from the outside edges of the rim
>>>>*backset is the measure from the outside of the back of the rim to the
>>>>mounting surface
>>>>*frontset is the measure from the outside of the front of the rim to the
>>>>lip
>>>>on the centre hole
>>>>
>>>>And which one is the right one?
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>Rim C is the size of the rim that came with the spare tire in my 62
>>>>Greenbrier, so I am taking that one as the correct one.
>>>>
>>>>Any theories about the other sizes?
>>>>-Camper versions?
>>>>-Industrial versions?
>>>>-??????????????????????
>>>>
>>>>Just another ho hum day in paradise!
>>>>toodles
>>>>Merv Krull
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