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01-03-2007, 08:01 PM
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CC Member
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Join Date: Feb 2006
Location: Scottsdale,
AZ
Cobra Make, Engine: Superformance, Roush 427R-095, Pro Systems carb, 2" headers, Buckshot Racefab side pipes, 10s off idle start
Posts: 705
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Not Ranked
I put on 325/50 15 Mickey Thompson ET street drag radials on the rear along with alike looking 15 inch wheels with an offset that move the placement of wheel in another .4 inches from stock. So that basically means the now wider tire is inward .8 inches and the outside is in about the same location when compared to the original .8 inch narrower BFGs that came on the car.
In doing this the driver side rubbed on an odd protruding lump of fiberglass of the inner wheel well. I repaired what I considered a defect and now it's never rubbed. The passenger side was fine.
I lowered the rear about 1/2 inch because the new tire is about 1 inch taller than the BFG. I did this with spring adjustment.
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01-03-2007, 09:11 PM
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CC Member
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Join Date: Jan 2007
Location: Santa Maria,
Ca
Cobra Make, Engine: 2001 SPF, Sold =(
Posts: 300
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Not Ranked
Wow, D-Cel... your car looks GREAT! Are those the original SPF wheels with those tires?
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01-03-2007, 09:25 PM
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CC Member
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Join Date: Sep 2003
Location: San Jose,
Ca
Cobra Make, Engine: SPF #1436 514
Posts: 1,489
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Not Ranked
I have 315/45 17's on the rear of mine. I couldn't even put my fingers between the fender and the tire and they never rubbed.
Scott |
01-04-2007, 06:24 AM
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CC Member
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Join Date: Feb 2006
Location: Scottsdale,
AZ
Cobra Make, Engine: Superformance, Roush 427R-095, Pro Systems carb, 2" headers, Buckshot Racefab side pipes, 10s off idle start
Posts: 705
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Not Ranked
Quote:
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Originally Posted by scootter
I have 315/45 17's on the rear of mine. I couldn't even put my fingers between the fender and the tire and they never rubbed.
Scott
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I like that look with the 315/45 17! Nice! I just put on some 315/35 17s. I'd of liked a little more side wall.
I got my wheels from Vintage. Here's about how they fit in there. I think I could fit a 345/35 17 in there. As it's presented in the attached thumbnail, the fender lip is at 25 3/4 inches. |
01-04-2007, 07:52 AM
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Banned
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Join Date: Oct 2003
Location: Yorba Linda,
CA
Cobra Make, Engine: SPF w/392CI stroker
Posts: 3,293
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Not Ranked
Quote:
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Originally Posted by greg schroeder
I like that look with the 315/45 17! Nice! I just put on some 315/35 17s. I'd of liked a little more side wall.
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Greg, I keep offering Scott thousands of dollars for his nearly worn out Goodyear F1 Supercar tires (no longer available...trust me on that one), but he keeps refusing. 
If anyone out there ever comes across 45 aspect ratio 17" performance tires, please let us know. 
-Dean
Last edited by RedBarchetta; 01-04-2007 at 05:38 PM..
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01-04-2007, 08:11 AM
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CC Member
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Join Date: Aug 2000
Location: Germantown, TN,
Cobra Make, Engine: Superformance #770, Stroked 351W (393 cubes) w/ Tremec TKO-600, 3.27 Torsen locker, 'Hi-Tech' Blue w/ White Stripes, Wilwoods, Bilstein coil overs...and a big ear-to-ear grin!
Posts: 1,147
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Not Ranked
Dennis and Bob (RIP, my friend) Olthoff recommend no lower than 27" at each fender lip, when measured directly over the axle. I have #770 set at 27" and even with my fat ass in it, I seldom bottom out and have no tire rubbing, even with my Goodyear Billboards on it. I have some slight rubbing in the front, when the wheels are cut far to the left or right, but this seems to be normal with everyone's car from my experience. SPF's done a good job of fitting their wheels and tires under their fenders. I can say that in almost every case I've seen where someone complains of tire rubbing, they've used to large a wheel - either too wide, or too wide an axle - or they've got it riding too low, or they don't own an SPF car. If you get your car too low, even an SPF will rub, though.
I'm running the Olthoff designed Bilstein coil overs...read "no firmness adjustment". But, they do adjust for ride height, and so far, no problems with rubbing in the rear.
Hope this helps...
__________________
Flyin_Freddie
"An opinion on everything...an expert at nothin'!"
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01-04-2007, 05:28 PM
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Senior Club Cobra Member
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Join Date: Feb 2006
Location: McKinney,
TX
Cobra Make, Engine: SPF #867 gone....
Posts: 1,272
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Not Ranked
My Michelin Pilot 335's don't rub on the back with my shocks set soft or hard. I have the old AVO's and not the new Bilstein's.
But my 275's on the front rub when turned too far left or right.
You'll be very happy with your SPF. Enjoy!
__________________
MadMiles442 
She said, "The only thing I'll ask of you, you gotta promise not to stop when I say when..."
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