CPP Drop Spindles: Conflicting Information

[mtnbikerxt]

OK. So I bit the bullet and bought the setup I was describing. The part number I bought was 6370SWBK6OE. This is described as "1963-70 O.E.M., 6-lug, drop, kit ". The kit comes with 2.5" drop spindles in the new smooth casting (no stiffening ribs on the "front" of the spindle (rotor side)). I took measurements of the spindles (distance from center of LBJ hole to wheel mounting face) and here are the results.

_____________________ LBJ Hole to Wheel Mounting Face
CPP CP4S2 Spindles ____ 5.302"
'70 C10 Drum Spindles___ 4.703"
____________________________________________________
Difference_____________ 0.599"

The CPP CP4S2 spindles move the wheels OUT relative to stock '70 C10 drum brake spindles by 0.6" EACH SIDE.

The actual drop is very close to the advertised 2.5".

Thus, the offset chart supplied by CPP (found here: http://www.classicperform.com/Instru...fset_Chart.pdf), which claims 1/16" wider than drums is incorrect.

[67ctener]

I think only the modulars claim to narrow track width. I know the modulars are only offered in 2" drop

[ksbrktracer]

Originally Posted by 67ctener

I think only the modulars claim to narrow track width. I know the modulars are only offered in 2" drop

This is correct ...! Standard spindles widen the track over drum brakes. They widen them to basically stock 71-72 track width give or take a tiny bit. Modular narrow the track width from 71-72 about 1'' to 1-1/8'' per side.

[lolife99]

Originally Posted by ksbrktracer

This is correct ...! Standard spindles widen the track over drum brakes. They widen them to basically stock 71-72 track width give or take a tiny bit. Modular narrow the track width from 71-72 about 1'' to 1-1/8'' per side.

Really?
Where did you get this info?
I've been trying to confirm this since the modular spindles came out.
1"-1-1/8" per side is a lot!!!

[lolife99]

Originally Posted by mtnbikerxt

OK. So I bit the bullet and bought the setup I was describing. The part number I bought was 6370SWBK6OE. This is described as "1963-70 O.E.M., 6-lug, drop, kit ". The kit comes with 2.5" drop spindles in the new smooth casting (no stiffening ribs on the "front" of the spindle (rotor side)). I took measurements of the spindles (distance from center of LBJ hole to wheel mounting face) and here are the results.

_____________________ LBJ Hole to Wheel Mounting Face
CPP CP4S2 Spindles ____ 5.302"
'70 C10 Drum Spindles___ 4.703"
____________________________________________________
Difference_____________ 0.599"

The CPP CP4S2 spindles move the wheels OUT relative to stock '70 C10 drum brake spindles by 0.6" EACH SIDE.

The actual drop is very close to the advertised 2.5".

Thus, the offset chart supplied by CPP (found here: http://www.classicperform.com/Instru...fset_Chart.pdf), which claims 1/16" wider than drums is incorrect.

This is the most proof ANYONE has posted about track width "supposed" narrowing (on this forum) to date.
I agree they do narrow the track width.
By how much?
Even CPP doesn't know for sure.

[ksbrktracer]

Originally Posted by lolife99

Really?
Where did you get this info?
I've been trying to confirm this since the modular spindles came out.
1"-1-1/8" per side is a lot!!!

From actual measurements. Converted a truck from standard CPP drop spindles to modular spindles. Measurements taken before and after. CPP is also quoting that measurement on their website now.

[ksbrktracer]

Originally Posted by lolife99

This is the most proof ANYONE has posted about track width "supposed" narrowing (on this forum) to date.
I agree they do narrow the track width.
By how much?
Even CPP doesn't know for sure.

The spindles pictured above aren't designed to narrow track width, I'm sure you know that though. Just making an observation .

[big d's red67]

Originally Posted by ksbrktracer

From actual measurements. Converted a truck from standard CPP drop spindles to modular spindles. Measurements taken before and after. CPP is also quoting that measurement on their website now.

X2. It'sy truck that Tommy is talking about.

[68blazer]

can i ask a really stupid question, well fine i'm going to anyway

what is the difference between a 2.5 cpp stock drop spindle vs. a 2.5 cpp modular drop spindle?

make fun of me if you want

[mtnbikerxt]

Originally Posted by ksbrktracer

The spindles pictured above aren't designed to narrow track width, I'm sure you know that though. Just making an observation .

The issue I have is that they claim on their wheel offset chart that these spindles should move the wheels out 1/16" relative to a drum brake spindle. They ended up moving my wheels out 0.6" each side. This is a big discrepancy which makes my wheels sit too far out in the wheel well. Granted, I am running a wide wheel with a small backspace. However, if CPP had not posted incorrect information on their website I would have likely bought the modular spindles instead and not had these issues.

Anyone interested in some drop spindles that have never seen any use? Just painted and mounted up!

[ksbrktracer]

Originally Posted by mtnbikerxt

The issue I have is that they claim on their wheel offset chart that these spindles should move the wheels out 1/16" relative to a drum brake spindle. They ended up moving my wheels out 0.6" each side. This is a big discrepancy which makes my wheels sit too far out in the wheel well. Granted, I am running a wide wheel with a small backspace. However, if CPP had not posted incorrect information on their website I would have likely bought the modular spindles instead and not had these issues.

Anyone interested in some drop spindles that have never seen any use? Just painted and mounted up!

I can see where that much difference would create an issue. What is the part # of the spindle that you got ?

For what it is worth (which is too late to help now ) All drop spindles that I know of will widen the track width of a drum brake truck about 3/4" per side .... give or take a bit. I dont know of any company except for the CPP Modulars that dont.

[outlaw 3454]

i started not to respond cause i went thru this and it was a bad deal but it all worked out
heres the deal if your spindles DO NOT have a separate bracket for the brake caliper then the wheels will be moved out, ONLY THE MODULAR ONES DONT.
plus the modular ones DO NOT have any holes or anywhere to mount the inside dust shield.
keep in mind modulars have a separate bracket for the calipurs. good luck
pat

this is a picture of modulars installed on 7" oem wheels with 225x70x15 tires and they will rub with the other spindles, not bad but they will.

[LostMy65]

Originally Posted by mtnbikerxt

OK. So I bit the bullet and bought the setup I was describing. The part number I bought was 6370SWBK6OE. This is described as "1963-70 O.E.M., 6-lug, drop, kit ". The kit comes with 2.5" drop spindles in the new smooth casting (no stiffening ribs on the "front" of the spindle (rotor side)). I took measurements of the spindles (distance from center of LBJ hole to wheel mounting face) and here are the results.

_____________________ LBJ Hole to Wheel Mounting Face
CPP CP4S2 Spindles ____ 5.302"
'70 C10 Drum Spindles___ 4.703"
____________________________________________________
Difference_____________ 0.599"

The CPP CP4S2 spindles move the wheels OUT relative to stock '70 C10 drum brake spindles by 0.6" EACH SIDE.

The actual drop is very close to the advertised 2.5".

Thus, the offset chart supplied by CPP (found here: http://www.classicperform.com/Instru...fset_Chart.pdf), which claims 1/16" wider than drums is incorrect.

I had exactly the same results.
they move the wheels out in relation to drums - even though I was told by a vendor here that they wouldn't move my wheels out.
It's funny how this has been a topic of frustration in these forums for several years now.

[LostMy65]

Anymore experiences of ones going from drums to modular spindles?
The standard cpp drop spindles moved my wheels out about 5/8" each side from where they were with drums.
Now I'd like to hear a couple more experiences from those who went from drums to modular spindles. It's just to costly of a purchase to not know for sure before hand.
Thanks

[ksbrktracer]

Originally Posted by LostMy65

Anymore experiences of ones going from drums to modular spindles?
The standard cpp drop spindles moved my wheels out about 5/8" each side from where they were with drums.
Now I'd like to hear a couple more experiences from those who went from drums to modular spindles. It's just to costly of a purchase to not know for sure before hand.
Thanks

I have been involved in the installation of 3 sets of CPP modular spindles. 2 of them involved replacing standard CPP drop spindles (which are shown above ) with the modulars. they narrowed the front track width by 1-1/8" give or take a 1/6''. We were able to put wheels on the front of both trucks that wouldnt otherwise fit. I do stock them ( $275.00 + shpg.) and the required bracket ($70.00 + shpg ) if you are using a D52 (stock type) caliper. Big brakes do not require the use of the extra bracket. Any questions please call . 918-845-1935.

For the record I personally Know of NO dropped disc brake spindle that narrows the front track width other than the Modular CPP. As far as I know all manufacturers dropped disc brake spindle moves the wheels out to at least 1971 and newer track width...... !

[LostMy65]

Thanks,
.


I need to know the track width change from drum brakes to cpp modular.
Has anyone went from drums to discs using cpp's modular spindles?
Did the track width get wider, and by how much?

[ksbrktracer]

Originally Posted by LostMy65

Thanks,
.


I need to know the track width change from drum brakes to cpp modular.
Has anyone went from drums to discs using cpp's modular spindles?
Did the track width get wider, and by how much?

I believe that the track width with Modulars is slightly narrower than a 1970 and older drum brake setup ... I believe the figure is about 1/4'' narrower than drum . I believe that 1971 and later were approximately 3/4'' per side wider track width than 1970 , back a 1971 up the 1-1/8 and that puts you at about 1/4''-to 5/16'' narrower give or take a fraction

[LostMy65]

Yes, that's what they tell us.
I need to KNOW. Not Believe.
I do appreciate your replies, but I need to hear from those who have actually went from drums to Modular.
Unless a vendor wants to guarantee that my wheels will not move out going from drums to modular, I'm not going to spend $300+ .
I was told by a vendor here that Cpp regular drop spindles would not move my wheels out going from drums. So I ordered a set.
They actually moved my wheels out 5/8".
I sent them back getting charged a restocking fee.
Thanks again for your replies.
I'm really wanting to hear some real life examples of one's who went straight from drums to modular.

[big d's red67]

Originally Posted by LostMy65

Yes, that's what they tell us.
I need to KNOW. Not Believe.
I do appreciate your replies, but I need to hear from those who have actually went from drums to Modular.
Unless a vendor wants to guarantee that my wheels will not move out going from drums to modular, I'm not going to spend $300+ .
I was told by a vendor here that Cpp regular drop spindles would not move my wheels out going from drums. So I ordered a set.
They actually moved my wheels out 5/8".
I sent them back getting charged a restocking fee.
Thanks again for your replies.
I'm really wanting to hear some real life examples of one's who went straight from drums to modular.

Ok, here we go again. I am NOT a vender, I went from drum to regular drop spindles to the CPP moduler spindles and I know for a fact not guessing not maybe but diffent the modular spindles are 1 1/8 inch narrower than the regular drop spindles and about a 1/6 inch wider than drums. I'm sure there a veranceis from truck to truck but not much.

[LostMy65]

Okay thanks.
That's one experience.
Anxious to hear more.

[outlaw 3454]

read post 62, thats mine, i went from drums to 'supposed to be modulars' and they werent and my tires rubbed, not bad but they did...now i have nodulars and the wheels DO NOT rub and they are the same tire and wheel. when i say rub i mean when hitting a dip in the road they would touch, i dont think it was going to hurt anything but i didnt want it to touch AT ALL. the nodulars are the only way to go!

[7D-TWO]

I also had issues with tires rubbing especially with the inner fenders so I had to remove them, and also after researching here and there I decided to try the cpp modular spindles. So I ordered the complete big brake ki and I'm really happy with the results. No more issues with rubbing. I didn't take any measurements but as long as it cleared I'm happy. U can see the damage on the tire. Excuse the dirty wheels....too much rain that week. I'd say it moved in at least 0.5".

[7D-TWO]

Also as for the drop. ...i had 2.5 spindles and the cpp say it's 2" drop only but it looks pretty much the same to me. I don't know what u all think about it though.

[Leverhead]

Looks like those modular spindles did the trick...big difference. I thought I would add to this thread that my experience is the same as the OP. In Jan I bought a kit from CPP also (6370SWBK-6D) and although I'm finally getting around to it I started mocking things up before I blow things apart and I'm finding the spindles moving the wheels (from orig drums) approx. 5/8" out also. Needless to say I'm pissed because before I purchased I was assured by a rep they would only be moved out 1/4" max. I want to keep my 15x8 rallys and that simply wont work. I find threads 4-5 yrs old about the same problem and just don't understand why CPP hasn't resolved this and why all the conflicting information. So here's a question:

If I have the std dropped spindles and kit (which I was led to believe are 'new design' spindles - 1/4" max out from drum) and I can only resolve this with modular spindles can I use the same hardware (calipers, ball joints, tie rods etc) that are in the std kit that I already bought...with the modular spindles? Or is the entire std kit useless without std spindles?

I'll have to wait till Mon to call them .... I thought I would ask here first because right now I don't know who or what to believe from CPP.

[LostMy65]

I think all in your kit should work.
The only thing I think you may need with the Modulars is the caliper mounting bracket.
Please keep us posted.
.
Your findings are exactly as mine;
the Cpp Non-Modular spindles moved my wheels out 5/8".