Let's talk spacers...

[Bulldog9]

I have 1 in steeda spacers that I initially put on my front tires. Since then I did the steeda lowering springs and found that on large bumps the tires rubbed the inside of the wheel well liner.

I'd really like to push the tires out a little bit further and think the one inch spacers will work well on the rear tires but I'm looking for something less than 1 in for the front tires.

I've also read that some of the spacers require permanent modification of the stock lug nuts. I don't want to do that. So on the 2019 - 2020 BULLITT
, can you use a thinner spacer than 1 in and not have to have them modified? I think 3/4 or one half inch would be perfect for the front.

What are you all using?

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[Jhonda]

I don’t know if anyone makes a 5/8th inch but that would be perfect for the front on a lowered car back doesn’t need much

 

[stungjoe]

If you use less than 1 inch wheel spacers, you either have to cut down your factory wheels studs as they will stick out to far past the spacer and your wheel wont sit flush against the spacer or you need to run longer arp wheel studs and get a spacer like the ones op mustang sells.

This is true if you have Magneride. If you don't have Magneride the 20MM spacers should work fine. The hubs are different for MR and non-MR cars.

..

I have MR and Steeda dual rate springs and plenty of clearance in the wheel well. Curious about the rubbing you have. Plus, I use 20mm spacers in the back. The 25mm spacers I have seen show a tad bit of poke but still should not cause rubbing unless you really slammed it with the springs.


If you do have Magneride you could switch to the GT350R hubs up front which give you the extended studs and then you could use the OP slip-on spacers but you will be back with the dilemma of either cutting the studs down or using open lug nuts.

 

[stungjoe]

Can you share where you seen the hubs are different? only hubs I know that are different are the gt350 ones and at that just their studs are just longer.

The non-MR hubs are held on by a center nut and have an exposed ABS ring. The MR hubs are bolted on from the back.
See this thread. The first pic is stock non-MR and shows the dust cap protecting the nut and the exposed ABS ring on the back side. The second pic shows the two side by side. TicTocTac also has an excellent thread where he installed the GT350R hubs on his EB with MR. See post 11 in the thread for some of his pics. In his first pic you can see one of the four bolts that hold the bub to the knuckle.
Magneride Front Knuckle Swap | 2015+ S550 Mustang Forum (GT, EcoBoost, GT350, GT500, Bullitt, Mach 1) - Mustang6G.com

 

[nustang]

" Professional installation by competent tire shop highly recommended"

I had bolt on spacers on my last ride, and the tire shop woudnt even swap wheels.
Liability issue ... tried a different one and they were hmmmmmmmmm well, ok, but didnt want to be associated with spacers. getting em to actually install em, good luck. Just my experience.

 

[WD Pro]

Professional installation by competent tire shop highly recommended

" Professional installation by competent tire shop highly recommended"

I had bolt on spacers on my last ride, and the tire shop woudnt even swap wheels.
Liability issue ... tried a different one and they were hmmmmmmmmm well, ok, but didnt want to be associated with spacers. getting em to actually install em, good luck. Just my experience.

I raised an eyebrow at the 1st post and agree with the second

The non-MR hubs are held on by a center nut and have an exposed ABS ring. The MR hubs are bolted on from the back.
See this thread. The first pic is stock non-MR and shows the dust cap protecting the nut and the exposed ABS ring on the back side. The second pic shows the two side by side. TicTocTac also has an excellent thread where he installed the GT350R hubs on his EB with MR. See post 11 in the thread for some of his pics. In his first pic you can see one of the four bolts that hold the bub to the knuckle.
Magneride Front Knuckle Swap | 2015+ S550 Mustang Forum (GT, EcoBoost, GT350, GT500, Bullitt, Mach 1) - Mustang6G.com

This is good info thanks

I can confirm from working on my euro (PP1) GT with MR - first time I took the wheel off I was like WTF, where’s the dust cap gone and why the spline with no hub nut ? Then I looked around the backside of the assembly

Interesting info ref the additional 0.6 degree of camber with the MR knuckle - ford keep that quiet when it’s the kind of info they play on with their marketing words when they do other special models (looking at you Mach 1) …

WD

 

[Bulldog9]

Interesting that the MR suspension has different hubs. I thought it was just the shock that was different.

 

[WD Pro]

Interesting that the MR suspension has different hubs. I thought it was just the shock that was different.

And rear springs (not just the rates) along with the front and rear lower suspension arms (drilled and tapped for the ride height sensors)

WD

 

[2morrow]

OP, your tires rub because you changed the geometry of your suspension. I run a 25mm spacer on front with 305 square tires with no issues. The question is what are you rubbing on?

If your rubbing on suspension components then you are eventually F’ed. if your rubbing on fender liners (In your case) then welcome to the big rubber club. It happens. There are trade offs but if you really want to handle then that’s a good direction to go into.

If your car is your daily I wouldn’t even go down this road. I would just look into a wider set of wheels with proper offsets (which is a whole other can of worms). However once you master offset you can really dial in tire width, flushness, brake clearance, etc.

DM me with questions, I am more than happy to help.

 

[stungjoe]

Interesting that the MR suspension has different hubs. I thought it was just the shock that was different.

I have the 9.5" rear wheels up front with 25mm OP slip-on spacers using the GT350R front hubs (extended studs), Steeda dual sport springs for the Magneride and have no rubbing of any kind. The dual sport springs on a PP1 MR car only gives about 1/2" of lowering so this may give me more ride height than yours.

DM me with questions, I am more than happy to help.

Please discuss here so maybe we all can learn. I, for one, love finding things out the easy way, i.e. someone else's trials and tribulations (not to mention expense). Knowledge is best shared.

 

[ICU812]

" Professional installation by competent tire shop highly recommended"

I had bolt on spacers on my last ride, and the tire shop woudnt even swap wheels.
Liability issue ... tried a different one and they were hmmmmmmmmm well, ok, but didnt want to be associated with spacers. getting em to actually install em, good luck. Just my experience.

Yup, spacers are a liability, most major shops won't touch them, with good reason.

 

[19gtMD]

I know this is a spacer thread, OP- but have you thought about getting a set of rims with the offset to give your car the look you want. Then no need for spacers... Sometimes you have to modify your studs due to the back of the rim not having pockets for the part of the stud that sticks out. In my case and on my car. I do have 20MM spacers that are on the fronts, but my rears, i believe the offset is just right. I bought my car the way it is. I think the fronts are 9.5 and rears 10.5.

 

[2morrow]

Please discuss here so maybe we all can learn. I, for one, love finding things out the easy way, i.e. someone else's trials and tribulations (not to mention expense). Knowledge is best shared.

I pretty much laid it all out for you in my explanation.


Here is a different explanation.



Just a FYI, there's nothing wrong with spacers if using quality products and done correctly. Many who run a square set up use spacers and drive their car hard (like myself).

If going down this road I would not use the bolt on type, go for a proper slip on spacer with extended lugs. However, if you are not comfortable with wrenching or rely on a shop for your automotive expertise or basic maintenance I would not use a spacer.

 

[stungjoe]

I pretty much laid it all out for you in my explanation.

I was more or less referring to any other questions the OP might have thought of that was not yet discussed in this thread.

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