17" Cobra spare in Avanti spare tire well

[sbca96]

I got some interest in this, so I thought I would post up some pics
of the spare tire compared to the Stude full size and also the spare
in the Avanti spare tire well. This is a special spare tire that is
made to clear the 13" Cobra brakes I have installed.

















Tom

'63 Avanti, zinc plated drilled & slotted 03 Mustang Cobra 13" front disc/98 GT rear brakes, 03 Cobra 17" wheels, GM alt, 97 Z28 leather seats, soon: TKO 5-spd, Ported heads w/SST full flow valves, 'R3' 276 cam, Edelbrock AFB Carb, GM HEI distributor, 8.8mm plug wires

[sbca96]

Here is some detail pictures I found of the Cobra Spare :







Tom

[sbca96]

I might add that the Cobra spare, having an aluminum rim, weighs in at
only 26 pounds as an assembly. The full size Stude wheel/tire that I
show in the picture, weighs around 50 pounds. Just FYI.

Tom

[N8N]

I saw the craziest thing the other day in the Pep Boys' parking lot (I needed some spray paint and some cheap wax) there was a VW Jetta in the parking lot with a real tire mounted on a temporary spare rim. Still had the warning stickers on the rim and everything. For some reason this thread jogged that memory...

I've actually had to use a Porsche collapsible spare. Even at 20 years old it worked, and collapsed back down again after I got home.

nate

--
55 Commander Starlight
http://members.cox.net/njnagel

[sbca96]

Some of the Cobra drag racers use the spares as front wheels while at
the track[:0]. I wouldnt recommend that, but I read about it.

Tom

[WCP]

I like that a lot! Gotta get me one to replace my 45yr old original spare that I would consider "very temporary". Tom, can you provide more info as to what to ask for at the wrecking yard, other than the wheel description - ie. application years? Bill

[sbca96]

The Cobra spare isnt cheap, and its not plentiful at salvage yards,
but its little cousin the GT spare should be. A Cobra spare is made
to clear the 13" brakes, for the average Stude this is overkill. The
GT spare should be 16 inches, and quite common. They are used from
1994 to 2004. Perhaps someone on the forum can confirm this. I'm at
the mercy of my Mustang buddies for info.

BTW, thank you Sean for the Cobra spare, it was appreciated!

Tom

[WCP]

Tom, What are the identification and size numbers stamped on the rim. These should be located in the stud hole area. Seems I goofed and got a rim for a '05 that has a T185/60R17 tire. The rim is a 17x5 J Ford #33R4-FA/KA. Unfortunately, I can't close the cover by about approx. 1". The backspace on the rim is approx. 5-5.25". What is the backspace on your rim. I haven't tried it yet, but I suspect a spacer will be required for tie rod/steering arm clearance. For the record, this wheel weighs 30 lb. and has a 81.375" circumference versus the 84.375" for the Michelin 215/70R15's that I'm using.

[sbca96]

2005 and newer Mustangs use a deeper backspacing.

This Ford install PDF lists the spare as part number F4ZZ-1K007-C or
Ford Racing part number M-1007-K.

http://www.fordracingparts.com/downl...htM-2300-K.pdf

Tom

[WCP]

I still need the numbers off the rim and the backspacing. That's what wrecking yards go by as well as year and model in inventoring their parts. Thanks, Bill

[sbca96]

Number on the rim is K195, backspacing is 3-1/4".

Tom

[mrobertweiss]

old thread, but additional information: this spare works well for 53 coupe with front and rear turner discs. The rear turner discs on a dana 44 have a little bigger tophat, and require more backspace clearance for the wheels, than the front. This spare clears both setups, and works well for emergency spare . The overall diameter is slightly less than the 205/65 R 15 radials I am using on this vehicle, but very close. Thanks, m weiss

[JRoberts]

Some of the Cobra drag racers use the spares as front wheels while at
the track[:0]. I wouldnt recommend that, but I read about it.

Tom

They may be using the spare wheels, but are they using the spare tire that comes on the Cobra. I have seen the spare wheels used on the front of LSR vehicles with narrow tires rated for the proper speed. Goodyear Frontrunners I believe is one choice. These wheels are narrow and since these cars are not cornering at speed but going in a straight line they work fine cutting down both weight and to some degree wind resistance (especially on lakesters).

[sbca96]

They may be using the spare wheels, but are they using the spare tire that comes on the Cobra.

Could be, I didnt research it that far. You may be onto something.

Tom

[okc63avanti]

I decided to change from the original factory wheels (15" x 4-1/2") to custom Halibrand 5-spoke (15" x 6") wheels with 215/70R15 tires (close to original diameter).



My spare wheel rim is also a 15" X 6" wheel (Ford NWRA 40273) with same size tire. Because of this the spare tire floor cover will not sit flush over the tire. So my plan is to go with an exterior tire cover (type used on Jeep Wranglers) and forgo using the floor cover insert. Since the tire cover shown below is black with a red script letter "A" (car exterior is painted crimson red) the "A" can stand for Avanti, but for those of you who are familiar with SEC football, you will recognize the script "A" is the University of Alabama's script "A". Which is just fine with me since that is where I went to school .... Roll Tide !!!