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#1 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Another B.S. Question...and yes I have read the FAQ :)
Five lug 5x5 fronts. 4 1/2" Drop 2 1/2 Drop Spindles 2" drop coil.
In the fronts...I have 2 1/2 Drop Spindles and will soon install 2" Drop Coils. I realize the B.S. of factory Ralleys are 4" (I believe). I am going with 15" TT II's on the front. The 15x7 TT II's I can only go 4 1/4" B.S. while 15x8 I can go 4 1/2" B.S. So the question is...Does anyone have a front drop of 4 1/2" with 4 1/4" B.S.? I am concerned with the inner wheel rubbing the control arm which the Ralley's did. I have done a lot of searching for answers to my question but have not really found the answer to my question. The TT II's are special order so I want to be right the first time. Thanks in advance. ![]() ![]() ![]()
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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! Last edited by 70cst; 12-10-2010 at 10:36 PM. |
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#2 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,699
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Re: Another B.S. Question...and yes I have read the FAQ :)
I wouldn't do it.
A 4" backspace on a 15" wheel is really close. Throw your suspension together and look at a steel ralley wheel. Then try to add another 1/4"-1/2". You might make them clear when the wheels are straight,... but the wheels turned lock to lock will be worse. You can go up to 17" rims,... I've had 17x8's up front (with a 5" b.s) and it worked fine.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 Last edited by lolife99; 12-10-2010 at 10:41 PM. |
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#3 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,699
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Re: Another B.S. Question...and yes I have read the FAQ :)
What about the the Torque Thrust D's?
(I know,... gray centers,...) I think they come with a 3.5" backspace.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#4 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Another B.S. Question...and yes I have read the FAQ :)
The questions is...
Will a 4 1/4" B.S. be cutting it two close? The only way I can go with a 15x7 is with a 4 1/4 B.S. The 15x8 TT II's are avaliable with 4 1/2" B.S. I know 4 1/2" B.S. will work and the inner wheel will not hit the control arms. I have 16x8" TT II's on the rear and they do fine ...but they are to tall in the front and hit the inner fender with a 4 1/2 front drop. The B.S. is fine. This is the reason for my questions... Thanks in advance.
__________________
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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#5 | |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,699
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Re: Another B.S. Question...and yes I have read the FAQ :)
Quote:
(that's less backspacing) I'm not sure I understand?!?
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#6 | |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Another B.S. Question...and yes I have read the FAQ :)
Quote:
Maybe that's my problem. I have been thinking of B.S. backwords. ![]() A Ralley wheel has a B.S of 4" and it will rub the control arm on a sharp turn....but it barely rubs. So if I understand this correctly...4" or less then the inner wheel will rub while 4 1/4" or greater and I will be in good shape. Am I on target??? ![]() Again thanks. ![]()
__________________
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! Last edited by 70cst; 12-10-2010 at 11:33 PM. |
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#7 |
67-72 parts collector,…
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Re: Another B.S. Question...and yes I have read the FAQ :)
You are backward.
Backspacing is measured on the backside of the wheel. From the center of the wheel,... to the inside lip of the wheel. For 15" wheels anything from 3-1/2" to 4" of backspacing will work with a little a-arm trim. Anything GREATER than 4" will rub.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#8 | |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Another B.S. Question...and yes I have read the FAQ :)
Quote:
Thanks!!! That answers my question. You get a "Gold" star for instruction for 67-72 Trucks Suspension 101. ![]() ![]()
__________________
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! Last edited by 70cst; 12-10-2010 at 11:42 PM. |
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#9 |
67-72 parts collector,…
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Re: Another B.S. Question...and yes I have read the FAQ :)
Here's a pic,...
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#10 |
67-72 parts collector,…
![]() Join Date: Nov 2002
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Re: Another B.S. Question...and yes I have read the FAQ :)
Put a set of 17's 18's or 20's on and be done.
8" rim with a 5" backspace up front.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#11 | |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Another B.S. Question...and yes I have read the FAQ :)
Quote:
For the time being getting two new wheels/ and tires is the best economical route for me. ![]() Unless I will the lottery. ![]() Again...thanks for the info as it is greatly appreciated. That is what makes this forum so special is the assistance that is given when one has an inquiry. ![]()
__________________
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! Last edited by 70cst; 12-10-2010 at 11:55 PM. |
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#12 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: Another B.S. Question...and yes I have read the FAQ :)
I would just get the 15x7 in stock bs. I beleive it's 3.75"
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#13 |
Project '67 454
Join Date: Jan 2009
Location: Columbia SC
Posts: 283
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Re: Another B.S. Question...and yes I have read the FAQ :)
I'm not a big fan of wheel spacers but some people do run them.
If the wheel you are looking at only comes in 4.25 backspacing you might want to add a 1/4" spacer to get back to 4" of backspacing. Another option if you really want to run that wheel would be to extend the steering lock tab on the lower control arm out just enough to keep the wheels from rubbing. (This is what I would try in your situation if you are determined to run that wheel and backspacing)
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67 C-10 SWB Fleetside 454 (current project) ![]() 99 Crewcab SWB Dually 454 ![]() 75 Datsun 280ZZ430 ![]() 94 Formula 232LS 454 ![]() |
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#14 |
Registered User
Join Date: Jul 2000
Location: Mo
Posts: 963
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Re: Another B.S. Question...and yes I have read the FAQ :)
I am running 15x7 ralleys on front with 2.5 spindles and stock 6 cyl springs with a v8 it sits pretty darn low. I dont know what the overall drop is for sure but I need to go to a larger dia. rim. If i use drive on wheel weights on the inside the control arm will knock them off and man it sounds like the frontend fell out and i ran over it. lol Wheels do flex also when you are driving so take that into consideration when they are runnin that close.
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New daily driver 96 Chevy K3500 crew cab dually 53,000 miles 350 Vortec 4L80 Nice ride 67 Chevy C-10 LWB Built 350 TH-400 Wifes ride and family rig: 2001 Furd Expedition 5.4 Liter ![]() Kickin back in Rolla,Mo. USA "Do the thing you fear most and the death of fear is certain" Mark Twain |
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#15 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Another B.S. Question...and yes I have read the FAQ :)
TT II's 15x7 5/5 -6mm 3 3/4"
Ok looks like I am good to go as the above wheel will do just fine. For some reason my thinking was backwards ![]() ![]() The 15x7 wheel will tuck into the fender nicely and I will have my 4 1/2" drop without any rubbing issues. My back wheels will be 16x8 which look just fine. Again thanks for your input as it is appreciated. ![]()
__________________
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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