Tire rubbing on CS fenders with Moonbeam
 

Ran in to an interesting problem and just wanted to get some input before breaking out the cutoff wheel.

Mounted my CS fenders and moonbeam arches. No problems. Fitment is top notch.

Got my tires mounted yesterday so I threw the wheels on today. Not giving it a second thought I pull it out of the garage to get a good look. Turned the wheel an hear a gut wrenching crack. Get out an see damage to the vent on the fender. Fortunately I hadn't put the carbon vent on so it is just in the fiberglass. Realize the tire is catching the edge of the fender vent.

The wheels were bought with the specs provided by CS and the tires are 285/30r20(26.7" diameter) Since the car isn't aligned I messed around with the settings. Nothing prevents it from touching, no matter how extreme.

So I figure I am left with the option of cutting the fenders and carbon vents to allow for the tire.

Any other thoughts?

https://uploads.tapatalk-cdn.com/201...3299f253f9.jpghttps://uploads.tapatalk-cdn.com/201...0bbc77ddac.jpghttps://uploads.tapatalk-cdn.com/201...e68790bccb.jpg



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So let me get this straight you're running 285 in the front plus being on 20's ? Wow!

No wonder it's rubbing I don't think those tire specs were meant for the front.

The diameter is 26.7 which is factory size. What am I missing?

I was running 27.2" diameter before with no problem.

Edit: 27.2 was with factory fenders, and normal offsets. Now I am on Moonbeam spec wheels and running a smaller diameter on a widebody. So not necessarily apples to apples



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the BACK of the wheel is hitting the edge of the wheel well? thats so strange, i dont think i've ever seen that before

is your caster out of whack or something?

i've heard and seen rubbing on the top of the wheel well and the front bumper tab but never the back of the wheel well, its so wierd

Same here. I maxed out caster in both (+/-) directions with the SPL arms.

Maybe I should yank the fenders and take it in for an alignment before making any cuts.

I also think the specs CarbonSignal gave me are meant for the stretched tire and camber gang. As they poke past the Moonbeam overfenders considerably @ ~2* camber (as measured using home method). Sorta pissed me off since I clearly articulated the tire and camber setup to to them.
I am thinking if the wheel/tire sat further inboard it wouldnt catch at that point.

I guess I am looking at a rebarrel. SMH


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Ouch,,,i know nothing about the moonbeam/ can't help any :(

thanks man. i was just telling my brother that this is what happens when you venture out in to the unknown.

the more and more i look at the whole situation the more i think the offsets are just too damned aggressive for the tires i want to run. CS clearly anticipated some (or even aggressive) stretch on these. the rears stick past the over fender by about 1/2"

at this point i am guessing i am 10mm too aggressive on the front and about 15mm too aggressive on the rear.

gonna take a moment to reiterate how annoyed I am with CS at this point. the overall experience was good, and the quality of product is top notch, but this leaves a black eye on the whole experience. i literally spelled out my set up to them when I asked for the specs. it's clear they didn't read a damn word of it and just gave me a generic recommend.

anyway, already contacted strasse to price out a rebarrel. gotta get this done quick. ZdayZ isn't THAT far off.

i'd do:
1) check alignment at shop first, see if anything is out of whack. if you have a good shop, have them put the new fenders on and **** with the settings. Caster is just one component, perhaps they can adjust not only caster but the other arms to actually get the wheel pulled forward a bit more. I had an issue with my old S14 where Firestone was doing the alignment on the rear of the car, which had every single adjustable arm possible, plus height adjustment on the coilovers. When i get the car back the rear wheel was left sitting very far off center, but had "correct" alignment specs. Turns out they were adjusting just one arm or something. A better shop took a crack at it and got the wheel more centered by playing with all 3

2) cut that marked off area on the fender, it doesn't look like you need as much as was marked off, and since its fiberglass it shouldn't be too hard to seal up

3) rebarrel last, since thats probably the most expensive

EDIT: whats wrong with the rear?

They just poke way further than I want at 2ish * of camber

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wheel specs? cuz i'm running 275/30/20 front and 315/25/20 rear on stock body . . .

So keep in mind it is a widebody kit (overfenders) so it is meant to run more aggressive offsets.

-20et on a 20x10
-25et on a 20x12

I am thinking at this point that it should be something like

-10 to -5et front and rear for the tire setup I have at 2* camber.

I am going to have it aligned and measure everything before going any further, but I am 99% I will want it rebarelled. I might also bump to a 10.5" width up front.



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hard to believe 10mm offset would gain that much clearance when turning the wheels, but i know stuff gets multiplied

Yea I agree. I expect I might still have to do some cutting.

My complaint evolved as I continued to look at the setup more critically. I have fitment concerns all around at this point.

for a better reference on how aggressive the offsets currently are. The photos I posted in the opening post are at 3.6* (+/- 0.1* for measuring error) of camber.



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Awesome wheels.

the carbon signal specs are definitely not intended for your setup. you have a pretty square tire/wheel fitment, and you're rubbing at such a tall height. A couple fingers gap from top of tire to fender from eyeballing that picture

what are they expecting you to run? like a 255/30/20? That would be 26.0 inch diameter, but that only gives you .35 inch extra clearance, which still doesn't seem like enough

so even if you stretched tires on their suggested specs, it seems like you'd still hit that part of the fender

which is why i suspect some wierd alignment setting