Will these fit? - Mercedes Benz SLK Forum

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#1 Old 02-24-2013
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Will these fit?

http://www.alloywheelsdirect.net/mer...poke_wheel_213

I am not sure whether the rear offset will fit. IIRC fronts have 36 and rears have 30 offset.

Opinions welcome.


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#2 Old 02-24-2013
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Yes they will fit It just means your rears will be 4 mm closer in to the car which is minimal. The 8.5 x 18's I just took off mine have a 35 offset and even with 255 tyres on they were still far enough away from the shock absorber to get my fingers between the two. The only reason I went for spacers on the ten spokes is that they are only 7.5 and have an offset of 35.

Interestingly when I measured the width of the tyres on the 18 wheels the rear 255's measure 9.5 inches from wall to wall and the 225's measure 9 inches. Considering the rims are an inch wider doesnt mean the tyre will be.

You wouldnt have any problems with those wheels
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#3 Old 02-24-2013
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Should fit OK. I believe the factory offset is 37mm front and 30mm rear. Four mm difference for the rear shouldn't be an issue.
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#4 Old 02-24-2013
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Thanks guys.


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#5 Old 02-24-2013
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Originally Posted by -1- View Post
Should fit OK. I believe the factory offset is 37mm front and 30mm rear. Four mm difference for the rear shouldn't be an issue.
Its 36 and 30 Its really to throw the rears out as they are wider, but 4 to 5 mm is nothing. The rears are less of a problem as you dont have a dirty great big caliper to avoid so if the wheels sit in a bit its not a problem as long as they dont get too close to the shocker
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#6 Old 02-24-2013
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Were these wheels available as an option for R171? Any one remember? Thanks


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Jon's very knowledgable on wheels and offset. I have a MB accessories brochure. Interesting, the standard USA 10 spoke SLK wheels are 36mm front and 30mm rear. The 17" AMG series III wheels (five spoke) are 37mm front and 30mm rear. The SLK 55 18" multi spoke wheels are 37mm front and 30mm rear. Most R171 17" wheels are 36mm and 37mm front. Not many subjects as confusing as wheel offset. Offset also varies between wheel diameter (16"-19").
Best to check with wheel manufacturer and seller when purchasing aftermarket wheels. When in doubt, ask.
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Unless they made them with a 36 and 30 offset then I would say no they wernt.
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#9 Old 02-24-2013
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Quote:
Originally Posted by JonB View Post
Unless they made them with a 36 and 30 offset then I would say no they wernt.
That could be an issue


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Quote:
Originally Posted by -1- View Post
Jon's very knowledgable on wheels and offset. I have a MB accessories brochure. Interesting, the standard USA 10 spoke SLK wheels are 36mm front and 30mm rear. The 17" AMG series III wheels (five spoke) are 37mm front and 30mm rear. The SLK 55 18" multi spoke wheels are 37mm front and 30mm rear. Most R171 17" wheels are 36mm and 37mm front. Not many subjects as confusing as wheel offset. Offset also varies between wheel diameter (16"-19").
Best to check with wheel manufacturer and seller when purchasing aftermarket wheels. When in doubt, ask.
Offset is a complex subject and as far as I can figure out seems to be a combination of accommodating the design to avoid clashing with other components and styling of the car. It has a bearing on where the centreline of the wheel is in realation to the centreline of the hub. There is a formula on the net that tells you about tyre wear and scrub based on offset etc. I find this is the most informative chart if your looking at MB wheels and the models they fit

http://www.alloywheelsdirect.net/inf.../mercedes-benz
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#11 Old 02-24-2013
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I think those wheels are designed for some of the C Class

But if you look at the section on SLK the AMG wheels have a 37 34 offset
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Originally Posted by nakulan7 View Post
That could be an issue
Why would it be an issue ???
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The brochure I'm referencing is the "Genuine Mercedes-Benz Accessories Wheels". Published 2005-2007? It shows a wheel for the R170, "Celaeno", 7 twin spoke wheel, which appears as the wheel in your link. The specs shows 7.5Jx17 ET 37 (B6 647 1821) and 8.5Jx17 ET 30 (B6 647 1822). Here's the LINK: http://www.ragtop.org/mbbrochures/2006/wheels.pdf . It's a 2006 version and a large PDF file. Give it time to load.
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#14 Old 02-24-2013
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Quote:
Originally Posted by JonB View Post
Why would it be an issue ???

As the damned insurance will consider this a modification, wouldnt they?


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Ram I wouldnt worry about them. The offset is OK for AMG wheels for a 171 so they are going to fit. At least they are OEM. Must be thousands of cars on the roads with aftermarket alloys that arent causing any reported problems. My 18 fronts are aftermarket alloys and you were there when we all hit that pothole and there isnt a mark on my offside front rim
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#16 Old 02-24-2013
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Quote:
Originally Posted by -1- View Post
The brochure I'm referencing is the "Genuine Mercedes-Benz Accessories Wheels". Published 2005-2007? It shows a wheel for the R170, "Celaeno", 7 twin spoke wheel, which appears as the wheel in your link. The specs shows 7.5Jx17 ET 37 (B6 647 1821) and 8.5Jx17 ET 30 (B6 647 1822).
So that is a different part number to the one that i have posted.


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Quote:
Originally Posted by nakulan7 View Post
So that is a different part number to the one that i have posted. Do you have the brochure as a pdf to link here please?
Check post #13. Page 34 of the PDF.
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#18 Old 02-24-2013
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Originally Posted by nakulan7 View Post
As the damned insurance will consider this a modification, wouldnt they?
Ram I doubt if the average insurance company or assessor has a clue what offset even means let alone what offset is specified. The only way you can tell is by taking a wheel off and looking in the back of it. As the spec for AMG wheels for the 171 is 36 34 I doubt they would have a clue. Plus its not really a modification as your not straying from OEM spec. If that were the case them fitting any none OEM part like brake pads or discs etc could be classed as a modification
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#19 Old 05-08-2013
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Learning more about offsets than I could imagine
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