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Discussion Starter · #1 ·
Are AMG wheels quite soft

Hit a pothole today. Nothing too major thought i better check after completing journey to make sure the tyre wasn't bulged and holy crap the wheel is toast

See image below

Tire Wheel Land vehicle Vehicle Car
 

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Discussion Starter · #4 ·
Wow, I'm amazed that there is no tearing or significant rip in the sidewall of the tyre. I went through a big pothole a few years ago with the old CLA and it was the opposite, no damage to the wheel but the Michelin had a massive tear from the bead almost to the tyre edge. Insurance claim?
These tyres are really hard to be fair.

The ride is very uncomfortable. Not sure if it is a trait of continental XL tyres

I was driving the missus mini cooper today and it has 205/45/17 dunlop run flat XL's and even they seem to be a much softer tyre.

I expected the tyre to be bubbled / blow out. Was in shock when i seen the rim was bent. On the face too. Strange
 

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Discussion Starter · #6 ·
Wheel Tire Car Land vehicle Vehicle



New 2nd hand rim (refurbed)

Total cost inc changing tyre and valve over £231.40

There was zero damage to the tyre but obviously i will keep an eye on it.

I have also dropped the pressure to 32 PSI instead of the recommended 37 PSI hopefully saving any future rims from damage
 

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Discussion Starter · #12 ·
32 up front? Whoa that may be a bit too low
Maybe 35 as a compromise
... you asked ... so bear with me

its just the rounding error that messes with my long term data sets ... and the error bars are much smaller ... eg 32 left and 32 right rears could actually be 31.5 left and 32.5 right which is a 3.1% pressure delta in suspension/grip/tirecooling performance across the twin 80sqin footprints that one day could mean the difference between holding a high speed turn or spinning out (of course similar considerations for the 36/36 fronts)

in a slalom run i can say for sure the overall time result is different for 34/30 vs 37/33 cold pressures (using conti ecs compound)

our mfa1 chassis are quite well tuned and its perfect and sensitive when balanced


on a separate thread ...

its the precision (not accuracy as thats just a bias term) in the pressure data over time that brings out things like bead leaks, treadwear/alignment issues, suspension consistency, tiny punctures, etc etc ... and so pressures are logged regularly together with a thermocouple probe for temperature references

as it is, there are a lot of variables for long term asset state monitoring, so being able to closely maintain one variable and make it a controlled constant helps make things a tad easier

similarly we use the tick marks on the dip stick to observe actual oil loss volume and hence engine tolerance changes ... or measuring the antifreeze mixture fills at 5mL increments for coolant loss rate and thus coolant loop condition checks ... or 0.1mm treadwear tracking for suspension/alignment monitoring ... granularity has its uses

i am a little cuckoo but thats just me ay?
This just went right over my head 🤣

I must say car is much nicer to drive at lower PSI 🤣

Usually on previous cars i just go with 35 PSI all round don't even bother looking at the recommended PSI. Always seems to have worked out okay in the past 😵‍💫
 

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Discussion Starter · #16 ·
[QUOTE="BigJase88, post: 413233, member: 36890"I must say car is much nicer to drive at lower PSI”

may i ask what tire brand model and size are on your rims?
and stock suspension?
Stock suspension AMG Line Shooting Brake 200d

Tyres are Continental ContiSport Contact 5's in 225/40/18 XL 92Y speed rating

They are marked MO so specced to Mercedes Orginial Non Run Flat

Manufacturing dates range from 2019 to 2021
 

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Discussion Starter · #18 ·
oh ... surprised your conti’s ride harsh even tho not runflat sidewalls
you may get premature carcass wear with consistent low cold pressures ... the ride will be a tad smoother but the sidewalls will take the hits
Either the AMG Line suspension is rock hard or the Conti's are an unforgiving tyre.

Harshes ride i have ever experienced. Probably harsher than my old Civic Type R and it was rock hard 😲

I notice the CLA specs low rear tyre running pressure around the 29/30 psi.

Might drop the rear to this pressure as currenrly 32 PSI
 

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Discussion Starter · #20 ·
Wheel Automotive tire Hubcap Tread Synthetic rubber


Got the bent wheel straightened and powdercoated gloss black

Couldnt diamond cut as had been done before. Stuck a cheapo tyre on as it is only for a spare.

Was thinking about getting the rest done the same but i am unsure 😵‍💫
 

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Discussion Starter · #24 ·
So the replacement 2nd hand one i purchased is now cracked 🤣

So do i re-instate the buckled now black one and get the rest powdercoated black to match

Or do i attempt to get the polished one welded

Or do i buy an aftermarket set of 18's or do i buy an aftermarket set of 19's

🤣

I have thought about it for the last 2 days and i am no further forward

🤯
 

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Discussion Starter · #25 ·
So i have made a decision.

Gloss black previously buckled one has been re-instated and the 3 remaining good ones are going gloss black to match.

Reasons for this decision.

The buckled one on the face is likely to be stronger than a welded cracked one.

I didnt want replica AMG ones with a sticker decal. Also i was unsure of cheap aftermarket wheel longevity.

So decision made. Will collect car on friday 😎


The cracked one i will possibly get done in a wacky colour get a glass top for it and it can be a coffee table. Lets face it, it was no good as a wheel 🤣
 
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