315 Tires - Minimum clearance to lower control arm

JC6715

Member

Oct 24, 2005

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16

Hillsboro, Oregon

Nov 9, 2008

#1

• Nov 9, 2008

• #1

Hey guys, just got most of my TCP G-Bar installed. I'm sizing up the largest rubber I can fit and was curious: What is the minimum clearance you want between a stationary part (lower control arm, spring) and the tire? There shouldn't be much run out as I want to run the BFG T/A Drag Radials in a 315/35/17 on 11" wide custom backspaced wheels (yet to be ordered).

How close can I get without worrying about rubbing. I'm not worried about the fender clearance, just the inboard tire to spring clearance.

Thanks guys.

Background: street car 98% of the time, maybe drag strip to she what she can do a couple times...

 

6

68EFIvert

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Jan 13, 2007

639

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17

Camas, Washington

Nov 10, 2008

#2

• Nov 10, 2008

• #2

That is a pretty wide tire for a 67/68 car. I don't think you will get it to fit without flares or mini tub. I have 275's and think I could go to 285's and not have problems. To answer your question I would leave 3/8" min clearance. If you want to look at my setup with a Gbar to judge how much space you have left to play with I live in Camas and you can come over and take a look if you want.

 

DK832

New Member

Apr 11, 2006

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Copenhagen, DK

Nov 10, 2008

#3

• Nov 10, 2008

• #3

12sec67 is running 315 drag radials on his without tubbing - with leafs! Looks sweet.

 

12sec67

Active Member

Oct 6, 2003

1,301

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36

San Diego, Ca

Nov 10, 2008

#4

• Nov 10, 2008

• #4

yeah, its real tight

little more than a 1/8" left for clearance to the leaf but there is room. Just have to figure out the backspacing for your combo.

 

JC6715

Member

Oct 24, 2005

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Hillsboro, Oregon

Nov 12, 2008

#5

• Nov 12, 2008

• #5

12sec67 said:

yeah, its real tight

little more than a 1/8" left for clearance to the leaf but there is room. Just have to figure out the backspacing for your combo.

Click to expand...

Any chance you have some pics from directly behind the car. I would like to see how those big ol meats look from the rear. Thanks!

 

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Grabber70Mach

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Jul 6, 2003

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Indian Head, MD

Nov 12, 2008

#6

• Nov 12, 2008

• #6

70 w//315's

 

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JC6715

Member

Oct 24, 2005

284

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Hillsboro, Oregon

Nov 13, 2008

#7

• Nov 13, 2008

• #7

Thanks Grabber.

I found this pic online:

<a href="http://smg.photobucket.com/albums/v687/jczj15/?action=view&current=richards-1967-ford-mustang-super-sn.jpg" target="_blank"><img src="http://img.photobucket.com/albums/v687/jczj15/richards-1967-ford-mustang-super-sn.jpg" border="0" alt="Photobucket"></a>

 

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bnickel

Founding Member

Aug 21, 2002

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lubbock, texas

Nov 13, 2008

#8

• Nov 13, 2008

• #8

comparing a 69/70 to a 67/68 isn't really a great comaprison since the 69/70 have more room in the wheel wells by a good bit. i've seen as large as a 335 section width tire on the back of a 69/70 with no tubbing, only minor clearancing, mainly by removing and/or relocating the bump stops, rolling the lips and some reshaping of the front inside corners of the inner wheel house.

you'll gain a little bit of room with the G-Bar over leafs but it's probably less than 1/2" or so. if you use the same size wheel and offset as 12sec67 you should have more than enough clearance.

 

dodgestang

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Dec 15, 2003

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Cecil County, MD

Nov 13, 2008

#9

• Nov 13, 2008

• #9

bnickel said:

comparing a 69/70 to a 67/68 isn't really a great comaprison since the 69/70 have more room in the wheel wells by a good bit.

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I will have to respectfully disagree with you there. I used to believe this also, until I compiled the charts, review the data extensively and talked to people who own both body styles. 67-70 have the same size wheel wells. 65/6 are much smaller. 71-73 are larger.

 

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bnickel

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Aug 21, 2002

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lubbock, texas

Nov 13, 2008

#10

• Nov 13, 2008

• #10

dodgestang said:

I will have to respectfully disagree with you there. I used to believe this also, until I compiled the charts, review the data extensively and talked to people who own both body styles. 67-70 have the same size wheel wells. 65/6 are much smaller. 71-73 are larger.

Click to expand...

if that were so then they would reasonably use the same wheel house panels, which they do use the same inner but the outer panels are different. the 69/70 outer wheel house is wider than the 67/68 outer wheel house and also the 69/70 outer is flatter at the top than the 67/68 effectively allowing a larger tire with less fitment issues and less chance of rubbing. i know of guys who replace the outer wheel houses on their 67/68 race cars with the 69/70 outer and they also push the quarter panel to make them fit, not much, it's less than an inch but wider is wider.

69/70 wheel house
http://www.mustangsunlimited.com/itemdy01.asp?T1=7895+01&Category=&catkey=EMUSTANG

67/68 whel house
http://www.mustangsunlimited.com/itemdy01.asp?T1=77895+01&Category=&catkey=EMUSTANG

 

polo708

New Member

Aug 17, 2007

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Miami, FL

Nov 13, 2008

#11

• Nov 13, 2008

• #11

so a 315 tire on 17" wheels would require how wide of a rim? 10"... more?

 

JC6715

Member

Oct 24, 2005

284

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Hillsboro, Oregon

Nov 13, 2008

#12

• Nov 13, 2008

• #12

polo708 said:

so a 315 tire on 17" wheels would require how wide of a rim? 10"... more?

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I'm planning on an 11" wide wheel. On BFG's website their section width measurement is based on an 11" wheel...

 

DK832

New Member

Apr 11, 2006

291

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Copenhagen, DK

Nov 14, 2008

#13

• Nov 14, 2008

• #13

I also use an 11" with my new 315's.