GLC - bald front tyres after 11.5k miles

[JBell]

A couple of people have said put the back on the front etc. What's the reason for this?

On a car that has the same size tyre all round you should always have the tyres with the most tread on the rear, this is mainly to eliminate aquaplaning in wet conditions. All the main tyre companies recommend this and any good tyre fitter will do this automatically

 

[3PTS]

Ok, that makes perfect sense.

Thanks!


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[LostKiwi]

The reason why you put new tyres on the back is for stability in wet weather.
Tyres with less tread are more inclined to lose grip in heavy rain and for most people it easier to control a vehicle with limited front grip than rear grip. You really don't want to hit the brakes and have the back end come round to overtake the front!

 

[television]

No mention on makes of makes at all, with so many out there with many with some good advantage

 

[3PTS]

No mention on makes of makes at all, with so many out there with many with some good advantage

Factory fitted are Bridgestone Dueler H/P Sport RFT.


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[JBell]

Factory fitted are Bridgestone Dueler H/P Sport RFT.

What have you ordered, I would be tempted with Goodyears or Uniroyal RS3

 

[3PTS]

Cancelled my previous order as they were non run flats. Might go with the same, but I'll have a look at your suggestions too. Thank you


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[LostKiwi]

Cancelled my previous order as they were non run flats. Might go with the same, but I'll have a look at your suggestions too. Thank you


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No joy with MB?
Just tell them you had the skipping/noise issue as reported by many owners and that now the tyres have worn the outside edge and you believe it to be related.

 

[3PTS]

No joy with MB?
Just tell them you had the skipping/noise issue as reported by many owners and that now the tyres have worn the outside edge and you believe it to be related.

That's exactly what I said to them this morning. Waiting for a techie to call me back


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[television]

All or it all changes is hit one wheel, and they are all out,,,, no clue of the best choose made

 

[Blobcat]

Same back and front. The 20's are 255/45/R20 101W.

Those are crazy tyre sizes based purely on fashion rather than any requirements for grip due to power output. Wheel and tyre sizes these days are the same as the old "L", "GL", "GLS" badge snobbery from the 80's and adding an "i" or "Turbo" badge just to show you're doing better than the poor sap in the base model. If you don't have at least 20" rims then you're obviously a failure...

One of the benefits I've noticed in the drive for lower emissions is that tyres s are returning to more realistic sizes because ridiculously wide tyres with almost no sidewall do nothing for fuel economy. They also do nothing for your spine and as you can only feel how bad they are when you're sitting in the car I don't see the point of them.

 

[davidsw]

new tyres supposedly give better grip , better to under steer than over steer.
However some suggest not swapping front to back because of difference in wear patterns

 

[LostKiwi]

F

Those are crazy tyre sizes based purely on fashion rather than any requirements for grip due to power output. Wheel and tyre sizes these days are the same as the old "L", "GL", "GLS" badge snobbery from the 80's and adding an "i" or "Turbo" badge just to show you're doing better than the poor sap in the base model. If you don't have at least 20" rims then you're obviously a failure...

One of the benefits I've noticed in the drive for lower emissions is that tyres s are returning to more realistic sizes because ridiculously wide tyres with almost no sidewall do nothing for fuel economy. They also do nothing for your spine and as you can only feel how bad they are when you're sitting in the car I don't see the point of them.

Funnily enough the whole big wheel small sidewall thing is a very UK fad, which is ironic given the poor state of our roads!

 

[3PTS]

Those are crazy tyre sizes based purely on fashion rather than any requirements for grip due to power output. Wheel and tyre sizes these days are the same as the old "L", "GL", "GLS" badge snobbery from the 80's and adding an "i" or "Turbo" badge just to show you're doing better than the poor sap in the base model. If you don't have at least 20" rims then you're obviously a failure...

One of the benefits I've noticed in the drive for lower emissions is that tyres s are returning to more realistic sizes because ridiculously wide tyres with almost no sidewall do nothing for fuel economy. They also do nothing for your spine and as you can only feel how bad they are when you're sitting in the car I don't see the point of them.

Maybe. I'm no pro driver that much is true. But I actually just like the look of the 20" spoked wheels compared to the 19" version. If we're not allowed to make choices based on personal preference rather than economy or what someone else considers sensible, then the world would be a very boring place!




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[kid-jensen]

If you can "cure" the juddering by fitting more grippy tyres (as Mercedes recommend), you haven't cured it, just masked it. The tyres will continue to wear excessively (normally on the outside).

Stick to your guns and demand the "official cure", you're in good company... Why buy tyres yourself itr Mercedes can be guilted into buying them for you?

 

[LostKiwi]

You can see the issue on this video at the 1 minute mark:

 

[3PTS]

You can see the issue on this video at the 1 minute mark:

My god! That's just what I need. See the way the tyre collapses right on the outside edge when it's at full lock! Those noises are more than familiar! Wonder if that's why the dealer still hasn't called me back.

Thanks LostKiwi!!


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[3PTS]

If you can "cure" the juddering by fitting more grippy tyres (as Mercedes recommend), you haven't cured it, just masked it. The tyres will continue to wear excessively (normally on the outside).

Stick to your guns and demand the "official cure", you're in good company... Why buy tyres yourself itr Mercedes can be guilted into buying them for you?

Thanks Paul! Good points well made.


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[LostKiwi]

I suspect there is a 2 fold issue.
1. MBs operate a lot of camber change on lock. That true of all models.
2. The 4WD system looks to be overly sensitive to wheel speed differences so is kicking in when it not required. The sounds and appearance is EXACTLY like what used to happen if my old Defender was in diff lock and you tried to turn a sharp bend.

Given the 4WD is electronically controlled I'm a little surprised MB haven't updated software to fix it but then I guess its possible that even if it looks the same it may be a different cause.

No matter what get the free new tyres if you can. Complain vociferously about it.

Try doing a google search on GLC juddering. There is a LOT of info about it.

 

[Blobcat]

Maybe. I'm no pro driver that much is true. But I actually just like the look of the 20" spoked wheels compared to the 19" version. If we're not allowed to make choices based on personal preference rather than economy or what someone else considers sensible, then the world would be a very boring place!




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You are free to "improve" or "ruin" your car as you see fit and I'd defend your right to do so. Your comment just reinforces that it's fashion based rather than engineering based. I very much like the look of a good alloy wheel, I also value my comfort and fuel economy as well and as I can't see the wheels whilst sitting in the drivers seat it's more about my comfort than looks to me. It also appears because of the fashion that the tyres are not lasting that long...