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Old 05-26-2021, 02:38 PM   #26
HO455
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Re: Control Arm Rubbing tire - solution 101 - found

I solved the same problem on my S10 by using a pair of 3/8" wheel spacers. Over 100k miles without issue. I had them made by a local machine shop with proper hub centering and wheel stud sizing. No generic parts house spacer.
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Old 05-26-2021, 03:11 PM   #27
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Re: Control Arm Rubbing tire - solution 101 - found

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Originally Posted by Grumpy old man View Post
No , They are advertised as the only drop spindles that don't increase the width , I'll get some more pictures and get a measurement of the width of the rotors side to side. I'm using stock A arms and 255 x 70 x 15 tires
I am running the exact same setup as Grumpy and just couldn't resist. I am now interested to see his photo and measurements. This is how my lower control arm looks compared to the wheel. 2-1/2" drop spindle, 15x8 rally, 255/70-15 tires. Plenty of room.

Now I am aggravated as I noticed a split in the outer tie rod boot and the one on the passenger side is totally split. WTH? These things aren't a year old.
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Old 05-26-2021, 03:35 PM   #28
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Re: Control Arm Rubbing tire - solution 101 - found

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Originally Posted by 67C10Step View Post
I am running the exact same setup as Grumpy and just couldn't resist. I am now interested to see his photo and measurements. This is how my lower control arm looks compared to the wheel. 2-1/2" drop spindle, 15x8 rally, 255/70-15 tires. Plenty of room.

Now I am aggravated as I noticed a split in the outer tie rod boot and the one on the passenger side is totally split. WTH? These things aren't a year old.
Turn the wheel full left and full right , Check clearance again , Sorry , I'm in the middle of hand sanding my firewall .

I hate hand sanding ! For the 3rd time ... rain tomorrow need to prime it again tonite .
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Old 05-26-2021, 03:52 PM   #29
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Re: Control Arm Rubbing tire - solution 101 - found

Could this part of my problem...

I have a P245/60/15 tire? Is the size a little to big adding to my issues?

I am just trying to look at all possibilities.

Thanks
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Old 05-26-2021, 05:04 PM   #30
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Re: Control Arm Rubbing tire - solution 101 - found

Tire size should be moot.... It's the wheel lip that interferes w/the a-arm gutter.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 05-26-2021, 05:12 PM   #31
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Re: Control Arm Rubbing tire - solution 101 - found

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Tire size should be moot.... It's the wheel lip that interferes w/the a-arm gutter.
True ... I am low on coffee
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1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

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Old 05-26-2021, 07:10 PM   #32
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Re: Control Arm Rubbing tire - solution 101 - found

The reason behind the one drop spindle mentioning does not increase width that is for stock 67 70 drum front brake measurement
71 72 disc is slightly wider so is the rear axle is slightly wider as well
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Old 05-26-2021, 07:30 PM   #33
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Re: Control Arm Rubbing tire - solution 101 - found

Here's a pic of mine , ignore the dust everything in the shop is covered in dust.
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1967 Factory short bed - Old school
'71 - 350 / 4bolt / 487 heads / Edelbrock C3BX
Muncie M-22 4 speed / Hurst Comp plus
Factory 12 bolt posi 3.73 / 255-70-15
Smoothed firewall / Factory cowl induction
Power disc brakes / power steering / 3.5-5" drop

Last edited by Grumpy old man; 05-30-2021 at 07:20 PM.
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Old 06-02-2021, 04:21 PM   #34
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Re: Control Arm Rubbing tire - solution 101 - found

Ok ... so if I understand it correctly:

I have a 4" BS and if I go with a 3" BS it will pull the tire another inch outwards? Thanks
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A husband can be right...or...A husband can be happy.

67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"


Remember: Everyday is a good day...Some are just gooder!
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Old 06-02-2021, 06:09 PM   #35
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Re: Control Arm Rubbing tire - solution 101 - found

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Ok ... so if I understand it correctly:

I have a 4" BS and if I go with a 3" BS it will pull the tire another inch outwards? Thanks
Yes. It will move the barrel of the wheel out vs the hub centerline. Doing so widens the track width if not going to a narrower wheel.

The more aggressive you get, the harder it is on wheel bearings as a result from the additional weighted leverage of a steel wheel. Just a maint related item to keep in mind.

Again..... Trimming the rain gutter is very common for the minimal clearance needed. It just needs to be done w/care in mind.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 06-03-2021, 12:13 AM   #36
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Re: Control Arm Rubbing tire - solution 101 - found

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Originally Posted by 70cst View Post
Ok ... so if I understand it correctly:

I have a 4" BS and if I go with a 3" BS it will pull the tire another inch outwards? Thanks
Maybe I'm wrong but it seems that if you go with less backspace, in this case an inch, wouldn't it bring the face of the hub inwards an inch? So if you wanted more clearance from the back side of the hub, 4.5" backspace would gain you a half an inch clearance?
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Old 06-03-2021, 12:19 AM   #37
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Re: Control Arm Rubbing tire - solution 101 - found

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Originally Posted by lil hoodlum View Post
Maybe I'm wrong but it seems that if you go with less backspace, in this case an inch, wouldn't it bring the face of the hub inwards an inch? So if you wanted more clearance from the back side of the hub, 4.5" backspace would gain you a half an inch clearance?
After further review, I see that your control arm is hitting the bottom outside the wheel. So I do believe that decreasing the back spacing of the rim would provide more clearance between the control arm and the bottom of the wheel.

In other words, maybe my above post is incorrect.
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Old 06-03-2021, 12:28 AM   #38
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Re: Control Arm Rubbing tire - solution 101 - found

Quote:
Originally Posted by lil hoodlum View Post
After further review, I see that your control arm is hitting the bottom outside the wheel. So I do believe that decreasing the back spacing of the rim would provide more clearance between the control arm and the bottom of the wheel.

In other words, maybe my above post is incorrect.
Backspacing is just like it sounds.
It’s a measurement from the wheel mounting surface to the inside edge of the wheel.
Less backspacing moves the wheel out.
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Old 06-03-2021, 07:12 AM   #39
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Re: Control Arm Rubbing tire - solution 101 - found

I just might go with a 7" wheel/tire combo in the front and 8" in the back. That would solve my problem plus I could decrease my BS without it going to far outwards.
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67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"


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Old 06-03-2021, 09:03 AM   #40
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Re: Control Arm Rubbing tire - solution 101 - found

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I just might go with a 7" wheel/tire combo in the front and 8" in the back. That would solve my problem plus I could decrease my BS without it going to far outwards.
Exactly. This is another reason many utilize the staggered front to rear combos.

Be prepared because even 7" wheels sometimes get close enough that it requires a little clearance work on those porky a-arm gutters. The OE disc brake 6" wheels are usually the ones that clear w/o issue. Aftermarket 7" wheels w/spec'd back spacing should be good.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 06-03-2021, 02:03 PM   #41
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Re: Control Arm Rubbing tire - solution 101 - found

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Originally Posted by SCOTI View Post
Exactly. This is another reason many utilize the staggered front to rear combos.

Be prepared because even 7" wheels sometimes get close enough that it requires a little clearance work on those porky a-arm gutters. The OE disc brake 6" wheels are usually the ones that clear w/o issue. Aftermarket 7" wheels w/spec'd back spacing should be good.
Thats my thinking - mabve add about a 1 1/2" BS with the 7" wheel should solve my issues.
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A husband can be right...or...A husband can be happy.

67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"


Remember: Everyday is a good day...Some are just gooder!
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Old 06-03-2021, 02:33 PM   #42
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Re: Control Arm Rubbing tire - solution 101 - found

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Originally Posted by 70cst View Post
Thats my thinking - mabve add about a 1 1/2" BS with the 7" wheel should solve my issues.
You need to get your nomenclature down for these discussions.

ADDING back-space means the wheel barrel would be moving closer to the source of your contact issue. Reducing back-space would mean moving it away from your contact issue.

You want a 6-7" wheel w/less BS than your current 8" wheel. That shifts the contact point @ the wheel lip farther away from the a-arm gutter while keeping a similar outer track width.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 06-03-2021, 02:42 PM   #43
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Re: Control Arm Rubbing tire - solution 101 - found

Quote:
Originally Posted by SCOTI View Post
You need to get your nomenclature down for these discussions.

ADDING back-space means the wheel barrel would be moving closer to the source of your contact issue. Reducing back-space would mean moving it away from your contact issue.

You want a 6-7" wheel w/less BS than your current 8" wheel. That shifts the contact point @ the wheel lip farther away from the a-arm gutter while keeping a similar outer track width.
Yes ... I presently have 4" BS on a 8" rim and I will go to about a 3" BS with a 7" rim
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A husband can be right...or...A husband can be happy.

67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"


Remember: Everyday is a good day...Some are just gooder!
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Old 06-18-2021, 11:45 PM   #44
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Re: Control Arm Rubbing tire - solution 101 - found

Did you ever resolve this issue?
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Old 06-19-2021, 03:19 PM   #45
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Re: Control Arm Rubbing tire - solution 101 - found

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Did you ever resolve this issue?
I ordered two 7" rims with 3" BS. The tire dealer said I can use the exisitng tires on either a 8" or 7" rims.
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67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"


Remember: Everyday is a good day...Some are just gooder!
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