Drop Spindles and Backspacing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

54belair · 03-31-2013, 03:44 PM

I have a question about backspacing!

Just got finished with installing the CPP 2 1/2" drop spindles. Some where I had read that these would work with stock wheels(?) Anyway, Im running currently 15" chevy rallys---and they rub. So far I havent put the brakes back together but it looks like they are going to rub also. So far all I can confirm for sure is the steering knuckle rubs the outer edge of the wheel.

Now, on to the question-- Is anyone running droped spindles and 15" wheels-- If so, what backspcing are you running.

I may have to come up with some junk wheels as rollers until after the painting is done.

sumtercleaner · 03-31-2013, 04:25 PM

Wheel spacer?
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BugzC10 · 03-31-2013, 04:48 PM

I have 2-1/2 CPP drop disc spindles, running 15x10 with 4" back spacing. I don't know if it makes any difference, but my front suspension is out of a 73-87 truck.
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Robznob11 · 03-31-2013, 05:16 PM

I run 15x8 draglites with 4.5 bs with western 2.5 drop spindles and stock calipers. My wheel weights kit do clear the knuckle. You can grind a little off if needed but I did not need to.
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PanelDeland · 03-31-2013, 07:06 PM

I'm running 15 in Rallies with a McGughy's 2 1/2 drop spindle.No rubbing or problems for mine.I assume the CPP spindles are the same.

Chevydude56 · 03-31-2013, 09:42 PM

I have 2 1/2" drop spindles on mine for '73- '87 no rubbing . I have had 6"and 7" wide rally wheels on it without a problem.

Can you post a picture where it is rubbing ?

Chevydude56 · 03-31-2013, 09:44 PM

I have 2 1/2" drop spindles on mine for '73- '87 no rubbing . I have had 6"and 7" wide rally wheels on it without a problem.

Can you post a picture where it is rubbing ?

54belair · 04-01-2013, 09:51 PM

It will be later this week before Im home again to post pics.

Basically, the inside edge of the steering knuckle is just rubbing the edge of the wheel. As I said, I dont have the brake calipers mounted yet, so Im not sure about any clearance issues there (stock 71-72 calipers). As it is, I could take 1/8 to 3/16 off the inside of the knuckle and have clearance.

Anyway, Ill post a pic later this week when I get home. Thanks for the comments.

Robznob11 · 04-02-2013, 09:55 AM

Yes sir this is a common problem depending on the type of spindles you bought! I guess i got lucky but many have ground off for clearance! I just knew i would have this problem since mine are 4 1/2 bs but i guess the westerns are just a little different by design! I know mine has a good 3/8 knob that can be deleated if needed! Grind it you should be fine!
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54belair · 04-02-2013, 11:13 PM

Yep---its that pesky 3/8 knob on mine too!! Knob gotta go!!!!

stevencvn72 · 04-03-2013, 03:19 AM

I'm running a 15 inch wheel 3 1/2 inch backspacing with McGughy's drop spindles and the only place they rubbed was the lower a arm. Not the steering knuckle. It's got '72 disk brakes too and they fit inside there like I knew what I was doing.

03-31-2013, 03:44 PM	#1
54belair Registered User Join Date: Mar 2011 Location: bolivar, mo Posts: 839	Drop Spindles and Backspacing I have a question about backspacing! Just got finished with installing the CPP 2 1/2" drop spindles. Some where I had read that these would work with stock wheels(?) Anyway, Im running currently 15" chevy rallys---and they rub. So far I havent put the brakes back together but it looks like they are going to rub also. So far all I can confirm for sure is the steering knuckle rubs the outer edge of the wheel. Now, on to the question-- Is anyone running droped spindles and 15" wheels-- If so, what backspcing are you running. I may have to come up with some junk wheels as rollers until after the painting is done. __________________ 1997 shortie stepside 1968 short stepside 1966 mustang 1966 chevelle ss Dont always go the cheapest route--You can save yourself into the poorhouse! My Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=489030

03-31-2013, 04:25 PM	#2
sumtercleaner Registered User Join Date: Oct 2012 Location: Sumter SC Posts: 76	Re: Drop Spindles and Backspacing Wheel spacer? Posted via Mobile Device

03-31-2013, 04:48 PM	#3
BugzC10 Registered User Join Date: Oct 2012 Location: Rose Hill Kansas Posts: 1,351	Re: Drop Spindles and Backspacing I have 2-1/2 CPP drop disc spindles, running 15x10 with 4" back spacing. I don't know if it makes any difference, but my front suspension is out of a 73-87 truck. Posted via Mobile Device __________________ 1970 C10 Short Stepper with 71/72 front clip.

03-31-2013, 05:16 PM	#4
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: Drop Spindles and Backspacing I run 15x8 draglites with 4.5 bs with western 2.5 drop spindles and stock calipers. My wheel weights kit do clear the knuckle. You can grind a little off if needed but I did not need to. Posted via Mobile Device __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

03-31-2013, 07:06 PM	#5
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,992	Re: Drop Spindles and Backspacing I'm running 15 in Rallies with a McGughy's 2 1/2 drop spindle.No rubbing or problems for mine.I assume the CPP spindles are the same. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

03-31-2013, 09:42 PM	#6
Chevydude56 Registered User Join Date: Sep 2009 Location: Syracuse NY Posts: 110	Re: Drop Spindles and Backspacing I have 2 1/2" drop spindles on mine for '73- '87 no rubbing . I have had 6"and 7" wide rally wheels on it without a problem. Can you post a picture where it is rubbing ? __________________ 1967 Suburban 292 3spd 1964 Chevy II wagon 1971 Monte Carlo 402BB 1964 Cadillac series 62 2dr 1964 Bonneville 2dr/ht 1967 GTO 1978 Chevy Van 30 1989 R30 Crew Dually Bonus Cab

03-31-2013, 09:44 PM	#7
Chevydude56 Registered User Join Date: Sep 2009 Location: Syracuse NY Posts: 110	Re: Drop Spindles and Backspacing I have 2 1/2" drop spindles on mine for '73- '87 no rubbing . I have had 6"and 7" wide rally wheels on it without a problem. Can you post a picture where it is rubbing ? __________________ 1967 Suburban 292 3spd 1964 Chevy II wagon 1971 Monte Carlo 402BB 1964 Cadillac series 62 2dr 1964 Bonneville 2dr/ht 1967 GTO 1978 Chevy Van 30 1989 R30 Crew Dually Bonus Cab

04-01-2013, 09:51 PM	#8
54belair Registered User Join Date: Mar 2011 Location: bolivar, mo Posts: 839	Re: Drop Spindles and Backspacing It will be later this week before Im home again to post pics. Basically, the inside edge of the steering knuckle is just rubbing the edge of the wheel. As I said, I dont have the brake calipers mounted yet, so Im not sure about any clearance issues there (stock 71-72 calipers). As it is, I could take 1/8 to 3/16 off the inside of the knuckle and have clearance. Anyway, Ill post a pic later this week when I get home. Thanks for the comments. __________________ 1997 shortie stepside 1968 short stepside 1966 mustang 1966 chevelle ss Dont always go the cheapest route--You can save yourself into the poorhouse! My Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=489030

04-02-2013, 09:55 AM	#9
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: Drop Spindles and Backspacing Yes sir this is a common problem depending on the type of spindles you bought! I guess i got lucky but many have ground off for clearance! I just knew i would have this problem since mine are 4 1/2 bs but i guess the westerns are just a little different by design! I know mine has a good 3/8 knob that can be deleated if needed! Grind it you should be fine! Posted via Mobile Device __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

04-02-2013, 11:13 PM	#10
54belair Registered User Join Date: Mar 2011 Location: bolivar, mo Posts: 839	Re: Drop Spindles and Backspacing Yep---its that pesky 3/8 knob on mine too!! Knob gotta go!!!! __________________ 1997 shortie stepside 1968 short stepside 1966 mustang 1966 chevelle ss Dont always go the cheapest route--You can save yourself into the poorhouse! My Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=489030

04-03-2013, 03:19 AM	#11
stevencvn72 Kill Bill...et Join Date: Aug 2008 Location: Winchestertonfieldville, Wa Posts: 366	Re: Drop Spindles and Backspacing I'm running a 15 inch wheel 3 1/2 inch backspacing with McGughy's drop spindles and the only place they rubbed was the lower a arm. Not the steering knuckle. It's got '72 disk brakes too and they fit inside there like I knew what I was doing. __________________ -Steve I ♥ Grease '67 Chev stepper http://youtu.be/38p_2Iu2fd0



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