Dang.......

I thought my wheel was zero effected by the impact of pothole in this post : https://mbworld.org/forums/e-class-w...are-wheel.html

I even used dial gauge to measure / inspect :



The best way to measure is not to use dial at all, but video it and use marker during edit...or go to a wheel balancer shop for them to spin the wheel
The damage is very minor and it is not side way damage thus dial gauge is not effective.


Here is the minor damage.



It does not shake left-right, but produce a very mild resonance at 100 MPH.... but smoother at higher speed.
I got pothole hit on 7th July 2023, Below log is 31st July 2023 I went out of town and has access to a decent highway and quite low traffic at some areas, here I assumed the resonance was from the Pilot Sport 5
which all 4 were having bad RoadForce values.


So next time I will use video instead, save time and easier to do anyway.


So total 3 wheels now and I am out of spare wheels and can't buy from Germany untill BBS Germany sort of their Chapter 11 thingy.



MICHELIN PILOT SPORT 5 - Anything close to 70Nm is bad. Thailand factory.


I am hoping by 5,000 KM of use, it will improve again this RoadForce value.







When new and first installed. I sent my driver with a minibus, my car stay at home.




For my Pilot Sport 4, I have consumed 2 set, so total 8.
Only 1 was a 110Nm RoadForce and I replaced it and I managed to claim a new one. All others were at 50NM or lower.
If only 1 tire at 110Nm roadforce, the car ride like a horse kinda jumpy when at 160KM/H or faster.

Now seeing all 4 of my Pilot Sport 5 having such high RoadForce values, I think this new tire model production run in Thailand was not yet properly calibrated, their machines or what ????
How in the hell 4 out 4 tires so bad ??? this is a 100% failure rate.


END

 

tires change all the time, sigh. I have Pilot Sport All Season 4 on my wife's car, great tires, but they are likely replaced with newer ones by the time we need replacement. I always use AS tires because they last years and I'm never sure what I'm going to run into. Mostly its hot dry summers, and very wet winters. The Pilot AS4's have been awesome wet tires and still have 2/3rds their life

She's at 70,000 miles, I think that's just under 100k km.

 

Yes, I've had similar results with new Continental DWS 06, Tire guy spun the tires a couple times each to reduce the amount of weights, also used the dots to no avail, I have 2 ounces on every rim now, which were all checked at the wheel straightener first, frustrating

 

With this RoadForce machine, tire makers are pissed

This is a Michelin Primacy SUV+ which so happened a customer after me and he has good result. I like taking notes that other tires are OK, this way we know the balancer is not the one out of whack ....LOL


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Tires are a pain. My big truck tires Ive used the same type for past 170k miles 90% will balance with under 2oz weights but will get the other 10% that need 10oz or so (road force balance).

My e250 when I got it had the continental extreme contact which were nice tires and balanced easy. When time was up tried the laufenn S FIT AS which were $100 US cheaper per tire. You would not like them as sidewall is soft so cornering not as good but for my freeway driving worked pretty good. They said they balanced out well.

I think my fuel mileage was tad better with the continentals so may go back to them when times up on these.

 

I have got Michelin Pilot Sport 5 (245 / 40 / 18 & 265 /35/18 front and rears ) tires on my car . I don't think I would exaggerate if I said " the best ever I have ever got " . I have not taken any notice of fuel mileage but I have seen quieter tires too . Comfort, sporty and braking performance is great

 

Our 212 wagon came to us with brand new Conti Extreme Contacts. We both thought they were rough riding and harsh and noisy. We replaced them with Michelin Pilot Sport AS4's and found a great improvement

 

Pilot Sport 5 is okey, aside from the poor RoadForce value on mine Thailand made and when you can do often 100MPH+ without cop busting our azz... a low RoadForce value would be higher comfort.
PS5 traction is actually only A , while Pilot Sport 4 is AA, the print on the tire.

The higher end tires in Indonesia is not easy to find, as they must pass local test/certification which is basically a rip-off as in "money talk",
and not safety talk if the tire is already a well known brand and of the UHP category.

So far Michelin is the one who dare to spend money for the test/certification , even for their Pilot Sport 4S
Too bad 4S does not come in my size, for my market. So only PS4 non S.
Now only PS5, not yet the newer Pilot Sport S5 yep not 5S, but S5. https://www.michelin.co.uk/auto/tyre...ilot-sport-s-5



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Yes the Michelin's are nice, but I need more snow traction than those provide and I'm not interested in dedicated snows and four more wheels

 

Few days ago I went to my BBS Wheel local dealer, to test fit the new forged wheel BBS Japan RI-A with ET45, for its clearance to my Brembo front caliper.
My current BBS CH-R Nurg edition is an ET47 but needed 5mm spacer for the front , due to Brembo caliper clearance and because the spoke/fingers of the CH-R is not outward enough.
I posted it here : https://mbworld.org/forums/e-class-w...-calipers.html

While I am more keen on the #1 RE-V7007 design, the #2 RI-A series I tested seems to have a more curved out spoke/fingers and if I can maintain the ET/Offset as close as possible to original ET48,
Brembo caliper clearance will need to be priority 1. I want to keep my wheel scrub radius as OE as I can, by going to ET45 BBS Japan, if RI-A model.
At first, I was speculating that I would need RI-A ET40 by photo alone, to no more use spacer and get my 4 pistons Brembo caliper cleared.




I went to the BBS dealer most importantly to buy a 4 pcs used CH-R Nurg edition exactly like mine, which so happened available this week.
Since BBS Germany Chapter 11 is still not solved, I could be owning a wheel type I can never buy the spare anymore....forever.
The dealer has a wheel balancer unit, so I used it to spin them 4 pre-owned CH-R Nurg edition wheels/rims and found 2 is not so good and very likely I will not be able to use it for high speed.
There then I have to decide, buy all 4 and only 2 as GOOD and while at it order RI-A BBS Japan forged which will come soonest 8 - 10 months.

I got no choice now with right front minor bent wheel on my car, 2 spare ones already consumed over two years ago period and I need to wait for BBS Japan forged wheel in about a year.
So I bought that 4 pre-owned wheels at 50% brand new price. Its not a good deal because I can only use 2 and not all 4 and pre-owned units while at it

Uncle Murphy visits over the years have proven that , I will consume 1 wheel per year.
Since I got 2 use-able spares, 2024 is OK and worst case if I bent one more in 2025 I still have 1 more spare to consume, and by end of 2025 the new BBS Japan forged ones would have arrived.

So that is the sad but rather happy story of the BBS CH-R Nurg edition.......


I have just completed testing all 4 last night, their dimensional run-out. Confirmed, only 2 is useable for high speed. One is Excellent, one more is Good. One is BAD and one more TOTAL LOSS.



END

 

Surya, can you take them to a wheel straightener? We have a few in my town, some do a fantastic job of getting them back to round. Here in the snow belt, there's never a shortage of huge chuckholes.

 

Hi Pierre,

Yes there are wheel straightener services in Jakarta, my friend told me.
However I will not allow any of my wheel/rim to be repaired.

They apply heat and that is a big no no for my safety sake.
I deal with aluminum diving tanks since the 90s, I adhere to their safety measure against heat exposure. Hence I will not repair my wheels. Me scared.
https://www.luxfercylinders.com/supp...ture-exposure/

Even Ford does not allow such repair : https://www.repairerdrivennews.com/2...-restrictions/
https://www.oemonestop.com/sites/def...red_Wheels.pdf

Once a year 1 wheel consumed, I will take it as annual "maintenance"...

Overall I am happy with BBS wheel for not cracking and only bending. Never loose air from bent wheel and not as risky as cracked wheel .
At the rate of speed I run on the bad highway bridge joints when I do Jakarta-Bali, I don't want to have repaired wheel on my car, it is not worth the risk.

Thanks P...

 

Hi S-P,
I agree with @Pierrejoliat. My replica AMG rims were fine on suburban/highway driving. Once I started driving downtown, several cracks with 35 profile tires. Another make with 45 profile also got a crack. all repaired by rim specialists. There are many kinds and compositions of aluminum. I have read here that 'same' MB rims from different factories will produce different longevity results. When I drove in Java many years ago, roads were better than my downtown and I do not expect that you have the temperature fluctuations we get in my area. But, I am guessing that overloaded trucks put a different kind of stress on your roadways. I like your many posts and hope your solution works for you.
CK

 

I agree, heating is not good, my guy does not use heat, it takes twice as long, but he runs my wheels on the straightening machine for about a half hour, not ten minutes, cracked I can see replacing, but bent with this cold process has worked out well for me, I drive 4k miles back and forth to Arizona each year at very high speeds usually around 100 mph, for hours at a time, have not had any issues so far

 

Wow, no heat applied...nice Thanks Pierre.

This is supposed to be the top wheel/rim repair facility in Jakarta.



They still use heat though but for my minor bent wheel, maybe I can get away without heat.
The question is, can they correct my wheel to at least 0.5mm maximum run out ? Must test them



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Wheel repair machine.... still using heat lamp, probably locked to max 200 Celcius.


.
Wheel repair shop. Again using heat.

 

My wheel straightener guy uses a machine like the second video, wheels need to be 150 degrees F to be malleable, but that's still touchable with gloves,you'll notice in first video, guy touches wheel immediately after warming it up. last video is steal wheel, LOL. I bet your guy can do it, you live amongst highly ingenious people

 

150F is only 65C, that is "warm" if for ALU .....

One thing leads to another.... this is what I like about this forum replies, made me research more.

This guy, is the designer and owner of a wheel repair machine. He is also SAE member who contributed/co-writer to SAE Technical Paper #2016-01-1573
https://www.linkedin.com/pulse/mista...e-don-neubauer
The Mercedes research thingy is interesting.......


https://www.sae.org/publications/tec.../2016-01-1573/ << DANG !!!! I can't even buy it unless I am a member. It is only USD37.00.

Some good downloads:
https://www.newarctech.com/cm/dpl/do...dPractices.pdf
https://www.newarctech.com/training.html



My BBS wheel alloy is Al Si7 Mg
https://texametals.com/blog/alsi7mg-...-need-to-know/

 

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Got the bent FRONT RIGHT wheel replaced, with the best of the pre-owned wheel. Unit 4 of 4.
.




The bent wheel measured without tire. Some zone maxed out my dial gauge which is only maximum 1.5mm range.

 

If you can get them to a millimeter out, that's really great, I bet they were no rounder than that when they left the factory or 30/1000's out

 

30/1000 inch is 0.762mm.
This number 4 of 4 pre-owned wheel is not bad, 0.36mm inner side and outer side at 0.48mm

I read new wheel should be 0.30 mm easy or 11.8/1,000 inch.
I will measure the new BBS forged RI-A next year when I get it end of 2025. I am curious.
Will also measure the then removed Flow Formed , BBS CH-R Germany ones, the Left Front and the two rears, never measured yet.

---------

My second best pre-owned wheel, number 2 of 4 is 0.88 mm inner side and outer side 0.58 mm

The other 2 other pre-owned ones :
Number 1 of 4 is a total loss as the mid barrel probably 1 mm radial run out, too lazy to measure but visible when I spin it.
The inner wheel side is 0.98mm and outer side is 1.10mm radial run out. Also bad.


Number 3 of 4 is bad at outer side 1.15 mm and inner side 0.75mm. Still useable as desperate emergency spare though.

 

Correct!, from BBS on the Forged wheels