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  #1  
Old 10-16-2011, 09:35 PM
Redefining normal daily
 
Join Date: Jul 2004
Location: Frederick, MD
Posts: 445
Impatience is getting the best of me: wheel question

Have a post over in Wheels and Tires, but you guys have spoiled me with your prompt replies to my questions

We have a spare set of stock wheels bought for our now-sold 1991 300TE 4matic that I'd like to mount snow tires on for our 78 300SD.

Best I can deduce from poking about Tire Rack is that 15x7 works for either, but the wheels they show as available for the 300SD have an offset of 23MM, while the wheels they show as available for the 300TE 4matic have an offset of between 35MM and 40MM.

How can I tell the offset of the wheels I have, and if I can use them on the 78 300SD?

Marks from the inside of the wheels I'd like to use on the 300SD:

2150070
70123
61/2Jx15H2
1244010802
ET48

thread in Wheels & Tires here

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1961 220b: first project car - sold.
2000 CLK 430: first modern Benz - sold.
2001 CLK 55: OMG the torque!!! - sold
1972 280SE 4.5: Baby Gustav
1991 300TE 4Matic: Gretel the Snow Bunny - sold
1978 300SD: Katz the Free Man - given away
1980 Redhead: Darling Wife
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  #2  
Old 10-16-2011, 10:28 PM
Redefining normal daily
 
Join Date: Jul 2004
Location: Frederick, MD
Posts: 445
Alright - think I've answered my own question (changed my search terms ).

Looks like the offset on the barn wheels (ET48) ain't a never gonna be right for the 300SD (which needs something in the ET25-30 range, from what I could find).

So - anybody can confirm or correct my new assessment, that'd be great. If I'm right, watch for some W124/W123 friendly wheels to show up in the classifieds section.
__________________
1961 220b: first project car - sold.
2000 CLK 430: first modern Benz - sold.
2001 CLK 55: OMG the torque!!! - sold
1972 280SE 4.5: Baby Gustav
1991 300TE 4Matic: Gretel the Snow Bunny - sold
1978 300SD: Katz the Free Man - given away
1980 Redhead: Darling Wife
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  #3  
Old 10-16-2011, 10:33 PM
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Join Date: Sep 2008
Location: New Brunswick Canada
Posts: 123
AFAIR, measure from a straightedge across the back of the rim to where the rim contacts the hub, then subtract 1/2 of the actual rim width, that will give the offset.
It will change how far 'in' the tire runs. Too little, tire stick past the fenders, too much, tires may hit the frame or body on sharp turns.
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1984 300 D runs, interior
1984 300 D light hit in front, RUST, mint/perfect dash, decent interior (see above), parts car
(hate to kill one)
1998 Dodge diesel
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  #4  
Old 10-16-2011, 10:51 PM
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Join Date: May 2002
Location: Blue Point, NY
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Quote:
Originally Posted by ramonajim View Post
Alright - think I've answered my own question (changed my search terms ).

Looks like the offset on the barn wheels (ET48) ain't a never gonna be right for the 300SD (which needs something in the ET25-30 range, from what I could find).

So - anybody can confirm or correct my new assessment, that'd be great.
Confirmed.

You cannot use those wheels on the 300SD without spacers.
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  #5  
Old 10-17-2011, 05:22 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 38,632
Also the use of spacers will require longer bolts....longer than your stock bolts by an amount equal to the thickness of the spacers. Longer bolts are available from an outfit called (I think) lugnuts.com.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #6  
Old 10-17-2011, 11:08 AM
Diesel Preferred
 
Join Date: Oct 2007
Location: Charleston SC
Posts: 2,788
Quote:
Originally Posted by ramonajim View Post
So - anybody can confirm or correct my new assessment, that'd be great. If I'm right, watch for some W124/W123 friendly wheels to show up in the classifieds section.
Correct, BUT they won't even work for a W123, same issue.
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/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC
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  #7  
Old 10-17-2011, 11:15 AM
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Quote:
Originally Posted by t walgamuth View Post
Also the use of spacers will require longer bolts....longer than your stock bolts by an amount equal to the thickness of the spacers.
That would depend on the type of spacer installed.
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  #8  
Old 10-17-2011, 11:37 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 38,632
He needs a 10mm spacer, I believe. No depending there.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #9  
Old 10-17-2011, 12:30 PM
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Join Date: Sep 2004
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Quote:
Originally Posted by t walgamuth View Post
He needs a 10mm spacer, I believe. No depending there.
"Type" and "thickness" are two different concepts.

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