ET - Bolts - Spacers (Again) - Mercedes-Benz Forum
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post #1 of 36 (permalink) Old 04-13-2019, 08:10 PM Thread Starter
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ET - Bolts - Spacers (Again)

So the AMG Mono's that I bought have an ET of 35. I thought they were 30's, shame on me. Today I pulled a rear wheel and hung the new rim on. I have some concerns.

1. Obviously, I need new lugs. But what size? I say this because of the offset and the rim. The face of the rim seems to sit inside the line of the previous wheels by about a half inch. Not a horrid amount to be sure, but less. Measured as if you were to drop a plumb from the outermost lip of the fender flare. Will this prove critical or a wash? My car does not have the factory bottlecaps, so I don't know what width of this gap it left Germany with. I have the 8 hole rims found on the w140 (??). I LOVE the way the rims look slightly wide and the tires wide and tall on the current set up.

From what I have read, spacers seem to be a bit of a band-aid and many recommend skipping them if possible.

2. Should I just buy the new lugs and drive it for a while as is? If I decide to go another route (eventually adding spacers) then I'll just buy more lugs.

3. Is there a table which shows which lugs to buy or is it just a matter of grabbing a gauge and measuring the depth of the rim lug bore and then the depth of the bore and the depth threaded into the hub? With my current wheels, the threads sit proud of the back face of the rim probably about 3/4 of an inch.

4. The diameter of the new 17" tires is less than the diameter of the old 16" tires by about 3/4 of an inch. 225/60/16s vs 225/45/17s. Hopefully, the additional amount of fender gap will not appear horrid. I fear that I may be shopping for tires at some point. I was hoping that these would suffice. I didn't do enough readin' and figgerin' I suppose. Shame on me.

Never knew just putting some rims on a car was such a PITA.
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post #2 of 36 (permalink) Old 04-13-2019, 08:53 PM
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Did you actually mount the wheel and see if it rubs anywhere ? If it doesn’t rub you don’t need spacers at all . It will just look tucked in but as long as it doesn’t rub it will work as is

Did you see how far your existing studs stick through the new wheel ?
and did you bolt them all onto the car ? Ideally you want at least 5-7 threads protruding through into the hub , but not so long that they hit the parking brake

Obviously if you buy spacers you’ll need even longer studs , so first you need to see if anything rubs without spacers , then decide whether you want spacers and how thick , then determine your needed lug studs length accordingly .
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post #3 of 36 (permalink) Old 04-13-2019, 09:07 PM Thread Starter
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I did not mount them because my lugs are too short. I only get a thread, perhaps two sticking out the back. I could probably JUST get them to thread into the hub, but I'd never lower the car and put it down on its wheels like that. The center section of the Mono's is thicker than my 8 holes and no new lugs came with the wheels.

I did not put one on the front, but I will try that next. I had the entire rear (both sides on jack stands) up since I plan on replacing the rear brakes and adding my thicker sway bar all at that same time. But when I went to jack up the front right, the rear of the car (same side) started to lift off of its jack stand and that gave me the willies. So I put it back down. I'll slap the old rear rims back on and jack up the front to check.

Thanks for your input. Pretty much along the lines of what I thought, but the wheels being tucked in concerned me. When I put new wheels on my w123 coupe I was thrilled with the way they protruded further out toward the widest part of the fender lip. Perhaps this caused me undue concern with my SEC.

I'll slap the old rears back on and try the new rims on the front and see if anything rubs. Fingers crossed.

Thanks for your input.
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post #4 of 36 (permalink) Old 04-14-2019, 12:28 AM
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I have seen many w126's with ET30 wheels and they work fine. As mentioned they are tucked in a little bit compared to stock. If they don't rub in the front then get some longer lugs and put them on. Usually 6-8 threads into the hub is a happy setup.
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post #5 of 36 (permalink) Old 04-14-2019, 06:38 AM Thread Starter
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I'll hang the fronts today and see how they fit. I assume that there will be no issue since I have seen so many SEC's sporting them. Then buy some bolts.
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post #6 of 36 (permalink) Old 04-14-2019, 01:27 PM Thread Starter
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Hung one of the fronts today. Looks like plenty of clearance at the tie rod and other suspension bits. I did not, however, try them with the wheel at full deflection L/R. I'll run the rims by the shop tomorrow to get a quote on refinishing. Honestly, they need so little work that if the price is idiotic, I may just attempt to do them myself. One guy quoted me almost 600 over the phone. Were they beat to hell, sure.

I'll start the search for replacement lug bolts.

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post #7 of 36 (permalink) Old 04-14-2019, 02:58 PM
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Originally Posted by oldmako View Post
Hung one of the fronts today. Looks like plenty of clearance at the tie rod and other suspension bits. I did not, however, try them with the wheel at full deflection L/R. I'll run the rims by the shop tomorrow to get a quote on refinishing. Honestly, they need so little work that if the price is idiotic, I may just attempt to do them myself. One guy quoted me almost 600 over the phone. Were they beat to hell, sure.

I'll start the search for replacement lug bolts.
Sounds like you are well on the path!

I have used EZAccessory on EBay [he's got a website too, I remember] with very good results for the stock chrome ones to the 33MM ones I use with the Aero 1s with ET11.

M.
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post #8 of 36 (permalink) Old 04-14-2019, 06:21 PM Thread Starter
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Here's 2 representative photos of the 5 rims. Four look just like this after cleanup. The 5th (the spare) has a bit more crud where the polished lip meets the paint but it's nothing heinous. I really could just hang them on and drive it, (especially if I haul ass!) but I figure the rest of the car is a solid 8 or 9, so I can't be tooling around town with my best gal driving on a set of 7's.

*I am amazed at how careless some people are with their rims. One needn't be Bob Oppenheimer to know that a low profile tire on an alloy rim is a recipe for disaster. Yet, at red lights and in parking lots, I look around and see 50 thousand dollar cars with the rims all beat to death with curb rash.
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post #9 of 36 (permalink) Old 04-16-2019, 09:01 AM
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I had test fitted a set of 17" those rims on my w126 before I ended up getting 18" staggered monoblocks off of a e55.


If im not mistaken I believe those come off of a c36/c43 - w202? I am currently refinishing the 17's and plan to fit them to my friends 300e.

Heres what I noticed when I test fitted them on the w126. The fronts did sit inboard a bit too much for my liking, spacers would be recommended, the rears sat way too inboard, and would require imo some serious spacers, atleast 30-40mm to make things look "fitted". I had a photo somewhere with the rims on the car in the yard, but cant find it right now..

With that said, I don't recall the offset of the 17" monoblocks I was test fitting, but I don't think MB made many different fitments of those era of rims as if I recall they were only fitted on the w202 amg cars.

The original MB rims are of very high quality so imo its worth the effort to use them and make them fit good. Check out the H&R DRA style spacers (they have internal threading so no need to use longer bolts for install).

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post #10 of 36 (permalink) Old 04-16-2019, 09:26 AM Thread Starter
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I bought them from a guy who bought them from a guy, so I am not sure of what they showed up on. He said they came off of a CLK. I don't know any more than that.

These are a staggered set with a spare: 3 @ 17x7.5 ET35
2 @ 17x8.5 ET 30

These are authentic AMG wheels from Belgium with MB part numbers cast into them. I was only able to hang them on the hubs with the car jacked since I don't have lugs yet. The rears sat in a bit, not nearly as much as I feared they would. Plus, they were hanging down from the suspension being unloaded so it's hard to tell.

One thing that I noticed right away is how much shorter they are overall from my old 225/60/16's. Almost a full inch. I fear that will look hideous once the car is off the jacks. Right now it's too tough to tell. The old tires filled the wells nicely and I loved the look.

I dropped them off yesterday for refinishing. When I get them back I'll do some more testing and hopefully, hang them. If they don't fit and/or I have to go nuts with wide spacers, I'll likely just give up and put them up for sale. I'll then rehang the old rims with new tires and chalk this all up to uneducated and irresponsible enthusiasm. Apparently, low # offset, 17" AMG Mono's are as rare as hens' teeth apparently and priced accordingly. I usually see around 2K and that's without shipping and tires. I got this set, with newish Michelins for $1300, and I got 5 of them.

I should stick to just changing the oil, belts, brakes and such. I know how to do those things.

Last edited by oldmako; 04-16-2019 at 09:29 AM.
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