Brown stuff on my tires and balance question

[nytebyte]

First the balancing question:
I recently got new Continental ExtremeContact DW's put on the Cobra and I had to bring it back to the tire shop due to balancing issues. Got a bad vibration at 48 mph and then again at 60.

The shop couldn't balance them properly unless they put a clip-on weight on the outside of the wheel. The stick-on weights on the inside of the wheel just wouldn't cut it. With my old GS-D3's I didn't have this issue. Has anyone else run into balancing problems with their tires? My only concern is that the weights will fall off. The last time I had clip-on weights, they all fell off within 5 miles of being installed.

Now the Brown Stuff:
There seems to be some kind of brown residue which is coating the sidewall of my new tires. I've tried to clean it but it won't come off easily. If I scrub it hard, it comes off in little bits, but at that rate it would take hours to clean. Anyone know what this crap is and how to get it off?

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[01bluesnake]

If they cant balance the tires, take it somewhere else. I have NEVER not been able to balance a tire or wheel combo with sticky weights, so someone isnt doing it correctly. The brown stuff can easily be removed with some commercial wheel acid/ degreaser or good wheel/tire cleaner.

 

[nytebyte]

If they cant balance the tires, take it somewhere else. I have NEVER not been able to balance a tire or wheel combo with sticky weights, so someone isnt doing it correctly.

I think I might do that next time. Yesterday, I just noticed that they scratched the living shit out of my wheels.

 

[FirstWorldProblems]

If they cant balance the tires, take it somewhere else. I have NEVER not been able to balance a tire or wheel combo with sticky weights, so someone isnt doing it correctly. The brown stuff can easily be removed with some commercial wheel acid/ degreaser or good wheel/tire cleaner.

+1 on the balancing issue, those tires should be incredibly easy to balance with sticky weights.

I think I might do that next time. Yesterday, I just noticed that they scratched the living shit out of my wheels.

Where at? They should have to replace them

 

[FirstPlaceOils]

Now the Brown Stuff:
There seems to be some kind of brown residue which is coating the sidewall of my new tires. I've tried to clean it but it won't come off easily. If I scrub it hard, it comes off in little bits, but at that rate it would take hours to clean. Anyone know what this crap is and how to get it off?

This

or this

 

[LazyT747]

superclean at about half strength. if your spray it on the tire while its dry and let it sit for a few minutes before scrubbing it should come off fairly easy. just dont spray it on your car, its pretty potent stuff and it will take off any wax u have on it.

id go right back to them they scratched your wheels though!

 

[sonicblue2003]

if the wheel needs alot of weight could also be a bad tire. I have seen that before. have them road force test the tire.

 

[nytebyte]

Yeah, I'm pissed about the scratches on the wheel. Why are shops so damned careless, especially with a car like a Cobra? If it were some POS Toyota, maybe.

They rebalanced the front wheels and now they're perfect, but I've noticed the rears need balancing too. I'll take it somewhere else for those.

 

[LazyT747]

i always got my tires at discount tire, never had a problem. plus u get to hawk them down when their doing the work since theres a giant window next to the first bay haha

 

[SBTerminator]

I have the same tires and no issues. Sounds like you need to find a new shop to balance your wheels and tires.