Swapping 20" AMG alloys to 19" alloys. HELP Mercedes S213

[Gutsy_Fungus]

Hello folks, first time of posting here... so forums wont let me post pictures or links...
So...digital equivalent of Pictionary here we come!

I'm looking for Advice on swapping out my AMG alloys from 20" to 19"

We have a 2020 (S213-Estate) E 220 AMG LNE NGT ED PRM + D A.

NO PICTURE OF MY 20" AMG Twist WHEEL HERE LOOK ELSEWHERE :-)

It currently has 20" AMG twist style alloys
Front: 245/35 R20
Rear: 275/30 R20

Why change alloys?
We have replaced two ballooned tyres in the last 6 months as a result of what I believe is Pot Hole Damage. The alloys themselves are good (not cracked) with only a little bit of kerbing on one or two of the alloys.

Upon looking, the wisdom of the internet notes that there is a widespread problem with the 20" low profile AMG wheels with run flat configuration and their lack of robustness with UK potholes. The general consensus from what I have gleaned is to move to 19" alloys with standard tyre to mitigate this problem...

So far so good... I just need to do it and I could do with the combined wisdom present here to help me along the way, make comment, and check my steps...Yup, I'm a hub and tyre noob! (I have had conflicting messages from tyre and wheel providers which makes me uneasy in my choices).

Mention offsets and my lip starts quivering!

1. Replacement alloys
I'm currently eyeballing a 19" aftermarket Twist alloy that appears identical to the AMG wheel. The price seems reasonable.

NOT A PICTURE OF A 19" AFTERMARKET TWIST WHEEL FROM THE LINK I CANNOT PASTE BELOW :-)

Details here from CM wheels:

NOT A LINK TO CM WHEELS 19 INCH AMG TWIST STYLE WHEEL GLOSS BLACK MACHINED :-)

Where I am getting a bit lost is with the specification...
The Site advises replacing with specification1:
19 x 8.5 ET45
19 x 9.5 ET45

Yet when you go to order it states a spec of:
19 x 8.5 ET45
19 x 9.5 ET50

Conflicting rear offset specs!

Anyone know what spec I should be going for here???? Any other comments

2. Replacement Tyres for new alloys:

I'm advised Standard tyres
Front: 245/40/19
Rear: 275/35/19

Does this make sense?

3. selling off the current alloys and tyres

I think I will be selling the old alloys and tyres. They are original AMG, One of the alloys needs a little tlc but other than that great alloys with nearly new tyres on them!

I am thinking it would be easier to sell them with a tyre on there? Or should I keep them for when it comes to selling the car at a later date? Convert them to coffee tables?

Your thoughts welcome

4. New TPMS sensors

As the old TPMS sensors would be with the old wheels I will need to get some new TPMS sensors that pre calibrate / talk to the cars brain...
Anyone got any experience advice on doing this?

Can I do it myself?
Do the Tyre fitters do this?
WiIl poking myself in the eye with a sharp spoon help?

Advice sorely needed here

I'm hoping all of this makes sense to someone...

Looking forward to your replies

Regards

Gutsy.

[gregpot2000]

HI There

I have a 2021 with exactly the same wheels, and same headaches! One cracked wheel, and one buckled in my year of ownership. I was constantly weaving around potholes bracing for impacts.


I was going through the exact same thought processes as you, thinking of changing wheels, or even trading the car in….I swapped out all the run flats for normal tyres, and it has completely transformed the car though! Those bone shattering impacts have changed from multiple times per day, to almost never, and I feel like I can drive the car normally again without thinking about and concentrating hard every drive.

Of course, I still look out for potholes, but the ride is now “unremarkable” and something I don’t think about, or even consider changing the wheels anymore, that’s the best praise I can give!

[Gutsy_Fungus]

Someone else posted a few moments ago (either it disappeared or I am pressing the wrong buttons). Not being able to post pics or links is making the conversation awkward. But that's fine there are good reasons behind it I am sure.

The poster posted a chart which does seem to suggest the alloys that have been suggested have the wrong offsets. Then again the chart has notes next to most entries, the notes don't go anywhere, note 1, and 7... but then it doesn't go on to discuss note 1 and 7. It leaves it a mystery.

<reaches for the hot needles>

All hail the information age.


I'm not entirely confident of the 20" alloys with standard tyres. I hear what you say and I'm happy for you. But I live in rural Cheshire and some of the roads (and even bits of Motorway) are bloody diabolical! that taken with the flood of noise from others regarding going to 19" makes me want to stay on course with the 19" options.

There is the option of trading the car in for a tractor and commuting to work in that. Would make the floods an insignificance too. An Idea?

[gregpot2000]

Fair enough, I live in Huddersfield and commute to Manchester 2 days a week. Our roads are terrible also....and agree on motorways. For the first time in 10 years of doing that commute, I'm finding potholes on a regular basis on the M62 and M60....these are quite dangerous! but I guess the same with any wheels....Waze is a godsend!

[TarquinMX5]

If you don't have any luck on here it might be worth looking on mb club uk forum

https://forums.mbclub.co.uk/

If not a member you could register and ask.

The issue of wheel sizes / tyres has been discussed many, many, times on there as your problem is quite common.

You might even be able to drop to 18" depending on brake caliper size and whether that size was an available originally (see the chart inside the fuel filler flap).

With the state of our roads I don't understand people's obsession with 'bigger is better' wheels. They might look better but are as useful as a chocolate teapot as the roads are so bad that as a driver you're now continually looking out for craters rather than the best line to take for a bend. Rant over.

I don't know what ETs you need, so can't answer that point.

[Gutsy_Fungus]

There's a MB club????

I never knew, I did search for quite a while for the problem and solution but just didnt get any hits on the solution (other than go 19")
Appreciate your advice and I'll go have a look see. Many thanks

[RSTurboPaul]

If the ideal offset is et45 but the wheels are et50 (i.e. 5mm further into the arch), a 5mm spacer should put them in the same place in the arch (I think) - although caution noted re: adequate nut/bolt thread required.

[AlBondigaz]

I went from the 19" AMG style wheels to a set of genuine Mercedes 17".

The 17's originally had Winter tyres but as the smaller wheels give a much nicer ride I replaced them with all season tyres and run them all year round.

[Dewi 2]

Gutsy_Fungus said:

I'm looking for Advice on swapping out my AMG alloys from 20" to 19"

We have a 2020 (S213-Estate) E 220 AMG LNE NGT ED PRM + D A.

It currently has 20" AMG twist style alloys
Front: 245/35 R20
Rear: 275/30 R20

Why change alloys?
We have replaced two ballooned tyres in the last 6 months as a result of what I believe is Pot Hole Damage. The alloys themselves are good (not cracked) with only a little bit of kerbing on one or two of the alloys.

I have a 2022 W213 with factory 18 inch AMG branded wheels.
Tyre size (same all round) 245/45 R18 100Y

Obviously the sidewalls are higher than yours, so should provide at least some extra cushioning in potholes.
The overall ride is sublime and if the lowest tyre noise is important to you, then Michelin Primacy 4 will be perfect.

I do my best to avoid potholes, but not always possible.
No tyre or rim damage has occurred yet.

[Robertb]

I have 19’s of similar dimensions on my X218 CLS with air suspension and the ride is still appalling at times.

If I was you and going to make a change I’d want 18s maximum and more sidewall.

[TarquinMX5]

AlBondigaz said:

I went from the 19" AMG style wheels to a set of genuine Mercedes 17".

The 17's originally had Winter tyres but as the smaller wheels give a much nicer ride I replaced them with all season tyres and run them all year round.

I like that colour, is it Hyacinth?

I also run an E-class (older coupé) on 17"; when I specced (is that a word) it I deliberately went for the only model with 17" wheels but then opted for the other options to bring it to the spec. I wanted. The reason for that was the abysmal state of our roads; the salesman was trying to get me to have the 19" wheels (they really suit the car, it's what everybody wants etc.). That was many years ago and, unfortunately, our roads have only deteriorated since then. I'll probably end up buying a tracked vehicle next time