This is topic Wheel Back spacing for Cobra brake conversion in forum Tech Talk at Northern California Ford Owners  .


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Posted by RAP66 (Member # 3360) on :
 
What is the correct back spacing I need to look for??

I'm using 03 Cobra brakes: 13in front with 94-95 spindles, MM K-member & A-arm.

11.65 rear with fox body length axles

I went to 50resto and the Bullitt rims I want state they wont clear Cobra brakes, yet American Muscle has a set that appears will fit. When I spoke to the tech at 50resto, he said I need to use 94-04 wheel specs. So I looked and depending on the wheel the specs are all different

SOOOO that;s why I'm asking... What are the numbers I need to look for? so I don't purchase something that does not fit.

for the front I want 17x9
Rear (I.m still undecided) because with fox length axles I believe the offset will be different than the front? If that's the case then I will do 17x10... IF I can use the same rim on the rear then I will do 17x9

Thanks

Rich
 

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Posted by 5.SL0W (Member # 9987) on :
 
94-04 fitment and backspacing is the same.

the 17x9 should be close 6 inches backpsace. I think its like "5.94"

Backspace on 17x10.5 inch rims should be between 6.5-7 inches depending on the rim and manufacturer. most 94-04 ford reps in 10.5 are 6.8 inch backspace.
 

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Posted by 5.0 LsX (Member # 10017) on :
 
10" on the back will need a 6.3-6.5 back spacing. you can use x9" all around but will probably want to put a spacer in the back to make it look more flush. I wonder why the bullets wont clear cobras??
 

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Posted by 5.SL0W (Member # 9987) on :
 
I had 17x9 bullits on b4 , they fit fine over the cobra brakes..
 

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Posted by 5.SL0W (Member # 9987) on :
 
Even the 17x8 bullits will fit, since 01 bullits came with "cobra" brakes and 17x8 bullit wheels from the factory..
 

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Posted by RAP66 (Member # 3360) on :
 

quote:

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Originally posted by 5.SL0W:
Even the 17x8 bullits will fit, since 01 bullits came with "cobra" brakes and 17x8 bullit wheels from the factory..

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EXACTLY what I was saying... 50Resto says their rim wont clear due to manufacturer machining?? (I don't have the email on this computer). I've seen at least 2 threads where after market repos didn't fit, one actually hit the caliper!

Which is what I'm trying to avoid

[ 2013-06-17, 04:06 PM: Message edited by: RAP66 ]
 

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Posted by RAP66 (Member # 3360) on :
 
oops

[ 2013-06-17, 04:05 PM: Message edited by: RAP66 ]
 

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Posted by 5.SL0W (Member # 9987) on :
 
if 50resto 1's dont clear then just dont order from them.. call o.e. wheels llc or american muscle or afs wheels.. they should have the ones with 17x9"5.94" backspace and 17x10.5"6.8" that clear cobra brakes.. the 17x9's that I had where from O.E. wheels an they cleared my 13 inch cobra brakes no problem..

[ 2013-06-17, 11:14 PM: Message edited by: 5.SL0W ]
 

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Posted by RAP66 (Member # 3360) on :
 
Thanks everyone!!

Until I bite the Bullitt, here is the wheel I'm considering but in 17" and Anthracite. I've only seen this version once and on a fox. Looked very nice



[ 2013-06-18, 12:56 AM: Message edited by: RAP66 ]
 

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Posted by 5.0 LsX (Member # 10017) on :
 
rivets are ugly
 

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Posted by 5.SL0W (Member # 9987) on :
 
=/

[ 2013-06-18, 11:31 PM: Message edited by: 5.SL0W ]
 

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Posted by CAStang (Member # 9568) on :
 
Here are my 17x9's on 13" cobra / bullitt brake calipers with SN95 spindles on a Fox





 

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Posted by 93lx4cyl (Member # 10517) on :
 

quote:

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Originally posted by 5.0 LsX:
rivets are ugly

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quote:

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Originally posted by 5.SL0W:
=/

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