I need help with Performa 25 W126 wheels - Mercedes-Benz Forum
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post #1 of 45 (permalink) Old 03-23-2019, 07:29 PM Thread Starter
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Garage
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I need help with Performa 25 W126 wheels

so today wasn't a good day for me, i was so exited to install the new wheels i got yesterday, i followed the instructions (wheels off set and tire size) from other members who installed the 17" performa 25 wheels before. I installed the rear tires and did a test , the car didn't move at all, it seems spacers needed, can you please see if the studs are long or not (from the black dust brake mark on the studs), and what is the recomended spacers that i need to buy, it seems the wheels are rubbing in the fender well. or the studs are long.

Tire size:
Front : 225/45/17
Rear : 255/40/17

Wheels:
Front : Rim 17x8J front offset 25
Rear : Rim 17x9.5J rear offset 25
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post #2 of 45 (permalink) Old 03-23-2019, 07:37 PM
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Usually if the car won’t move at all your studs are too long . Don’t need spacers just shorter studs

But are the wheels rubbing the inner fender liner ? Your pic is Too hard to tell what it is showing . Mount them up with the long studs and feel for clearances . If there’s inner rubbing you’ll need spacers
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post #3 of 45 (permalink) Old 03-23-2019, 07:46 PM
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From your pictures I am getting the impression that the threaded portion of your lug bolts sticks out too much. KRH advised in an earlier post somewhere how much is allowed on the back before you'd hit the parking brake hardware when installing the wheels. IIRC about 5-6 threads max sticking out. I hope KRH will advise here.

For the front wheels the lug bolts should be fine, is only on the back that the length is so critical.
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post #4 of 45 (permalink) Old 03-23-2019, 07:48 PM Thread Starter
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Yes, picture number 4 showing scratches on the fender well.

Quote:
Originally Posted by tusabes View Post
Usually if the car won’t move at all your studs are too long . Don’t need spacers just shorter studs

But are the wheels rubbing the inner fender liner ? Your pic is Too hard to tell what it is showing . Mount them up with the long studs and feel for clearances . If there’s inner rubbing you’ll need spacers
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post #5 of 45 (permalink) Old 03-23-2019, 08:14 PM
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Quote:
Originally Posted by Faiz Jan View Post
Yes, picture number 4 showing scratches on the fender well.
Yes, you need spacers.

You could try a few whacks with a big hammer. The point that interferes with the wheels seems to be protruding a bit from the rest of the inner fender.

Tolerances are tight on our cars. AMG put the absolute max width wheel with the 17x10, ET 17 at the rear. However, depending on your springs and variations in geometry, you could still get rubbing.

I've had a go with a hammer in my rear wheel wells to eliminate occasional rubbing.

Regards,
Axel

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post #6 of 45 (permalink) Old 03-23-2019, 08:31 PM Thread Starter
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5 mm spacers ?


Quote:
Originally Posted by AxelWulff View Post
Yes, you need spacers.

You could try a few whacks with a big hammer. The point that interferes with the wheels seems to be protruding a bit from the rest of the inner fender.

Tolerances are tight on our cars. AMG put the absolute max width wheel with the 17x10, ET 17 at the rear. However, depending on your springs and variations in geometry, you could still get rubbing.

I've had a go with a hammer in my rear wheel wells to eliminate occasional rubbing.
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post #7 of 45 (permalink) Old 03-23-2019, 08:50 PM Thread Starter
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The back spacing area is so tight, the back of the wheels are rubbing the fender well (not from the fender side) ,i think spacers will push the rims forward the fender a little bit for clearance, so i don't know how thick the spacers should be.
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post #8 of 45 (permalink) Old 03-23-2019, 08:55 PM
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Quote:
Originally Posted by Faiz Jan View Post
The back spacing area is so tight, the back of the wheels are rubbing the fender well (bot from the fender side) i thing spacers will push them forward the fender a little bit for clearance, so i don't know how thick the spacers should be.
From the looks of it, 5 mm spacers should suffice. Brings the offset down to 20.

Regards,
Axel

1990 SEC, Arctic White w/gray interior, M119.960 326 Hp. engine from 1992 500 SL, 722.370 transmission from 500E (reinforced clutches), 2:82 Differential, Euro Headlamps, 1st Gear Start module, One-Touch Window module and Keyless Entry module all from BergWerks, Bilstein HD Shocks on front axle, H&R lowering springs front and rear, AMG 3-piece 17" rims, 8.5" in the front and 10" at the rear.


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post #9 of 45 (permalink) Old 03-23-2019, 09:29 PM
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Wasn't there a member who just installed these recently... Black car

I'm sure he will be of great help
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post #10 of 45 (permalink) Old 03-23-2019, 09:31 PM
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I may have quality 5mm spacers in proper bolt pattern the garage. PM me if needed
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