315’s on fox body rubbing

CaseyRF

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Feb 19, 2020
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Morehead City
Managed to squeeze some r888r 315’s under a worn out 93 notchback. Some minor rubbing on the outside of the tire and was wondering how to stiffen up the rear. It has newer, cheaper shocks on it and some old worn out springs.
 

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Better shocks will help, but only so much. You need a way of limiting axle movement. The rear axle is still going to articulate and cause the tire to hit the fender lips. The wheel is protruding past the fender lip, so fender flares may be the only solution as there's not much you can do when the wheel sticks out past the fender by so much.

Is there room on the inside of the wheel to spare? If so, are you running fox-lenght axles? If you are, you could look at having the inner mating surface of the wheel machined to draw that wheel in a bit as well.

Only other solution is a wheel that fits better.
 
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That is a bunch of wheel sticking out the wheel well. That 315 is not actually fitting...its poking out.

To keep the fender from hitting the tire will take more than shocks. These spacers go inside the coils of the spring and help keep the spring from collapsing. I use two on each side of my IRS. ( its been ran like that for 12 years ).

Screenshot_20201207-100819_Chrome.webp


These work and will not pop out of the spring. Helps to keep the car from squatting too much.
 
Better shocks will help, but only so much. You need a way of limiting axle movement. The rear axle is still going to articulate and cause the tire to hit the fender lips. The wheel is protruding past the fender lip, so fender flares may be the only solution as there's not much you can do when the wheel sticks out past the fender by so much.

Is there room on the inside of the wheel to spare? If so, are you running fox-lenght axles? If you are, you could look at having the inner mating surface of the wheel machined to draw that wheel in a bit as well.

Only other solution is a wheel that fits better.
Forgot to mention that these are sn95 axles. Would machining the wheel not potentially decrease the integrity of the wheel itself?
 
That is a bunch of wheel sticking out the wheel well. That 315 is not actually fitting...its poking out.

To keep the fender from hitting the tire will take more than shocks. These spacers go inside the coils of the spring and help keep the spring from collapsing. I use two on each side of my IRS. ( its been ran like that for 12 years ).

Screenshot_20201207-100819_Chrome.jpg


These work and will not pop out of the spring. Helps to keep the car from squatting too much.
Yea I know they do stick out more than I thought they would. However, my 285’s on 17’s rub pretty bad also. I feel as if something could be mechanically improved to stiffen the suspension up a bit. The spacers are a great idea
 
If the the rear end assembly is moving side to side a lot, you probably have worn control arm bushings. That will not fix tires that stick out like a 1970’s high jacker. But it can also lessen the wheel hop when the control arms are at the new angles.
 
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Forgot to mention that these are sn95 axles. Would machining the wheel not potentially decrease the integrity of the wheel itself?

Depends on how much you take off. There's a little bit of material to spare.


However, before you go there, I would explore if swapping to Fox-length axles would fix this issue. They will pull the rear wheels in 3/4" each side and that might fix your problem. You'd just need to see what you need to do to the inner wheel wells, but usually a BFH is the solution there.

I assume these are 94-98 Sn95 axles in a fox house, or an entire 94-98 housing. If it's an entire 99-04 axle, those are 1.25" wider each side and will definitely cause you problems.
 
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Depends on how much you take off. There's a little bit of material to spare.


However, before you go there, I would explore if swapping to Fox-length axles would fix this issue. They will pull the rear wheels in 3/4" each side and that might fix your problem. You'd just need to see what you need to do to the inner wheel wells, but usually a BFH is the solution there.

I assume these are 94-98 Sn95 axles in a fox house, or an entire 94-98 housing. If it's an entire 99-04 axle, those are 1.25" wider each side and will definitely cause you problems.
I’ll look into the LCA’s. I think if I do fox axles I’ll need some serious massaging of the inner fender. Have about 0.5-1” of clearance or so
 
Those are good looking wheels.
With that said, fox length axles would be the first place to start. But remember, you will now lose that 3/4 in on the inside.
My guess is that with those wheels, that size tire, there isn't a scenario where there is no rubbing.

There have a been a few members that have battled 315's and i don't think any of them officially eliminated rubbing.

Stiffening the suspension is not a solution. All i seem coming from that is a vomit worthy ride quality.
 
If you went back to a fox axle you could run a spacer and hardened moroso studs. The 3 inch ones can be cut down to the length you need. Thats if they won't fit with a BFH to the inner wheel tub. Aftermarket lower control arms help tighten it up. The spacers I posted won't cause a harsh ride...its more like a gentle cushion. Small bumps are like stock....bigger bumps get absorbed just without as much compression. My rear quarters don't even get as low as my tire in the rear at all. My rear is 1.5 inches wider per side. The offset of the first set of wheels made me have to use those spacers. During my trip to Myrtle Beach from MD so many people complemented the stance I left it like that. They will work on your springs too. Might have to take the bottom of the shock loose and lower that side with a jack to get the spacers in. Lots of people also use zip ties to keep them from walking down to the bottom rung. I never had that problem. They'll be coming out when I get coilovers back there.
 
Stiffening the suspension is not a solution. All i seem coming from that is a vomit worthy ride quality.
As I was reading this thread....... this is exactly what I was thinking!
Wheels, tires, and suspension should all work together. One should not be made to work..... because of the other! JMO.
 
Once you cross an 9in wheel and a 265 things start to get tight. Each time you go up 10mm the wheel fitment needs to be more accurate.
I'm guessing those are 10in wheels, a 285 may look like a rubber band on them.

Just keep in mind my tolerance for tire rubbing is pretty much at zero.
Form and function need to be equally important.
I'd find some used tires on craigslist and experiment before i spent $400 on new rear tires.
 
Looks like those wheels are past the point of rolling the fenders, or even a different tire size. Those wheels are the wrong offset for the car plain and simple but I guess that's the new fad... If you are persistent on keeping these wheels, you could lift the car. The donk community does this often with large wheeld cars. New urethane isolators could give you what you are looking for.
 
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Looks like those wheels are past the point of rolling the fenders, or even a different tire size. Those wheels are the wrong offset for the car plane and simple but I guess that's the new fad... If you are persistent on keeping these wheels, you could lift the car. The donk community does this often with large wheeld cars. New urethane isolators could give you what you are looking for.
Yea I may have to step it down a size wheel. I seen wicked step sister on Instagram tuck 285’s so I thought I’d give it a shot. These may look better on my new edge anyway