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The Tire Rack's Tire & Wheel Forum
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Old 05-05-2013, 10:49 AM   #1
MarckusSB
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Lets talk about cutting fenders

I'm a little new to the fitment scene and I have encountered an issue.

I own an e46 coupe on coilovers. I'm running 18x8 et13 with 225/40/18 front and 18x9.5 et25 with 235/40/18 rear M Parallels and I'm having some serious rubbing issues.

The front have a decent roll and only rub during full lock or when hitting bumps during cornering. My real issue is the rear fenders though. I've rolled them and tried to remove/ move as much as that tar as I can, leaving the remainder as a flat, smooth edge. It just isn't enough.

I've heard of guys cutting the rear fenders but to be honest I'm not sure where they are cutting and how they are sealing them.









Which is in turn doing this




Can you guys enlighten me on this? Also, no, I'm not going to raise the car or change anything else on the setup. This should only be about discussing fender modification, not an attack on slammed cars.

Thanks!

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Old 05-06-2013, 11:10 AM   #2
jkalro
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Are your fenders rolled? have you thought of adding camber to your wheels ? it might be a better option. This way the wheels will go inwards. Also, if you look up on some of videos on youtube they talk about switching your inner plastic liner to the one from M3 as it allows a lot more room on the inside for bumps etc.
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Old 05-06-2013, 01:32 PM   #3
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^He said his rears are rolled.

Adding a bit of camber in the rear might help, but if you want to cut your fenders, you're basically going to be removing the lip altogether. When I've seen this done, it's with an angle grinder. Keep in mind though that the inner fender and the quarter panel could separate when you do this though.
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Old 05-06-2013, 02:15 PM   #4
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Cutting and welding the fenders is not for the faint of heart. But, it is the best, long term solution.

Try adding some negative camber. Also, if you don't mind a bit more stretch, a 225/40-18 on back might give you the clearance you need as well.
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Old 05-06-2013, 02:32 PM   #5
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...and it still sounds like you have an issue in the front. It's a bmw...you should want it to turn and handle bumps without the tires hitting. And after you cut pieces off your car so you can keep your wheels, what happens when you load up the trunk?

Be careful in the future about sacrificing function for aesthetics...that hot babe...the one that lives in a complex with a speed bump...you have to pass on her.

There are many, many threads here about tires/wheels that don't fit. It's not about the slamming you've done; it's that you got the wrong tires/wheels for what you've done. Please be careful. Freaks me out to see the car cutting up tires. You're not the first and won't be the last.
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Old 05-06-2013, 02:55 PM   #6
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^ Sounds like he is freaked out about cutting tires too... and wants to know a solution. So, we suggested cutting/welding the fenders, more negative camber, or smaller rear tires.
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Old 05-06-2013, 08:23 PM   #7
MarckusSB
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I'm not cutting the tires thankfully, or I wouldn't be driving it. It's more of a rub that over a long trip that gets the tire hot and it starts to melt.

I could add a little camber, but this is my daily so I'd like to preserve tires for as long as possible. (No more sliding either!)

These tires are new so replacing them unfortunately isn't within my budget or else I would have put 215/40's up front.

I'm not necessarily scared about cutting the rear fenders, but more curious if a walk through or diy is available so I can get an idea about what my shop would really be doing.


And for the record, I have 7 (seven!) speed bumps to get in and out of my apartment complex and I scape the undercarriage before the tires hit the fenders, so I'm guessing I chose we'll on my coil overs.

Thanks for all the help
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Old 05-06-2013, 10:41 PM   #8
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Camber and keep rolling the fenders. If you keep going over the fenders with your roller, they will slowly but surely start to flare out. This will only work if you need just a few mm's, if you need a lot more room then you are basically screwed. You got few good suggestions but seem to have more reasons why you can't apply them?? C'mon man
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Old 05-06-2013, 11:03 PM   #9
lamsv
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Also... yes, camber will eventually eat your tires... but toe out of alignment is what REALLY eats tires. A degree of negative camber probably won't eat your tires that much faster, and might give you the clearance you need.
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Old 05-07-2013, 01:20 PM   #10
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I wouldn't be super concerned with the negative camber. Just make sure the toe is within spec. If your tires are directional and symmetrical, flip them often.
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Old 05-08-2013, 08:04 PM   #11
MarckusSB
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Very true. Thanks guys! I'll put a few degrees of negative camber and see how that goes.
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Old 05-08-2013, 08:52 PM   #12
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I have a wagon, so not sure how different the rear fenders are, but I took a grinder to the inside of the rear fender to fit my 8.5 26et (effective) wheels . I basically took out all of the plastic and trimmed all of the parts out that were rubbing. I ground down the infamous stud and masked off a few mm to have a guide how much I wanted to trim. Then, I just started grinding..slowely...making sure not to heat it up too much. After I trimmed my intended amount, I sanded, applied some touchup paint, reinstalled the plastic and checked for rubbing. To me, it was much less invasive than rolling, but I didn't have to trim that much (like 5mm). The most dangerous part was the passenger side where the gas filler tube it. Sparks fly EVERYWHERE...So be smart...cover it well.

Probably some grinding and added camber and you will be there in the rear. =)
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Old 05-13-2013, 08:37 PM   #13
KILL3RD1SAST3R
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Lets talk about cutting fenders

OP, I'm currently rockin M-Pars from an e38 like you. 18x8 et13 and 18x9.5 et25. But I have Falken fk452s, 215/35/18 up front and 215/40/18 in the rear, slightly smaller tire than you. My fenders are rolled all the way (no cutting) and I'm lowering on BC Racing coilovers and I don't have too much trouble with rubbing like you do. You might wanna try getting a smaller tire for your rears!


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