Uneven wear on front tyres

[survey]

If the tyres are run at very high pressures, this will enable the car to wander more, and the same for 1 too low, it will pull to that side.

My tyre pressures are generally kept to the upper range of recommended.

 

[television]

My tyre pressures are generally kept to the upper range of recommended.

Not for me and many others, it just is not needed on normal motoring, and average of 33lb or 2.2bars is fine on most and I run all of my cars at that pressure and always have done. Keeping the pressure so high gives a bumpy ride and more wear in the center of the tyre than the outer.

 

[survey]

Not for me and many others, it just is not needed on normal motoring, and average of 33lb or 2.2bars is fine on most and I run all of my cars at that pressure and always have done. Keeping the pressure so high gives a bumpy ride and more wear in the center of the tyre than the outer.

Exactly - and that is why I am perplexed that it isn't the centre that is wearing on my tyres!

 

[Rory]

Not for me and many others, it just is not needed on normal motoring, and average of 33lb or 2.2bars is fine on most and I run all of my cars at that pressure and always have done. Keeping the pressure so high gives a bumpy ride and more wear in the center of the tyre than the outer.

Mine should be 30 front and 33 rear but I tend to go for 31.5 all round as the fronts wear the shoulders and the rears wear the centre.

When I took the car to the place in Liverpool, first thing he did was whack up the tyre pressures, especially the fronts which he put on 38. He said the 2.7L engine is heavy. Hmmm... I've always felt the car is kind of on tip-toes anyway, and increasing the pressures makes it worse. I had him put them back down again.

 

[whitenemesis]

Surely even tread wear must be the ultimate indicator of correct tyre pressure? That said I'm pretty sure that there will be a fairly wide range of pressures over which the difference in wear across the tyre will be insignificant. Plenty of scope to find an acceptable compromise between wear,handling and comfort. The one thing I have found through experience is the need to maintain the specified differential in front to rear pressure.

 

[John Laidlaw]

Being a Hybrid I am sure MB Liverpool try to make sure the MPG is maximised in mine and therefore always inflate to the top end of recommended.I drop a couple psi off for the same reasons mentioned by others- the ride is hard enough without hard tyres too!

 

[oigle]

MB said mine was fine so I took it to WIM some years ago and they said it was mostly pretty good but corrected the toe-in.

It still drifted (actually it's more like it gradually rolls on more lock) left.

More recently I had new tyres fitted and took it to a well recommended place in Liverpool. Again said it was very good, hardly worth adjusting but did slightly adjust the toe. The guy there reckoned with the angles my car was showing that, if anything, it should run to right.

It doesn't - it still rolls on left lock. They started talking about the steering angle sensor causing the ESR to activate the brake to pull the car left so I thought that was a good time to leave.

I'd be more inclined to look to slightly increase the negative camber on the LHS ( or decrease the neg on the RHS) to offset the road camber. 1/4° can make a difference. As stated before, toe-in must be set according to the total amount of neg camber involved. More neg/more toe-in. I had lots of fun setting up my ML before it tracked well and wore tyres well.

 

[survey]

Well, just changed my front tyres. From earlier posts on this thread you will be aware of the front nearside edge wear. The tyres had done 30300 miles and there was about 3.5mm of tread apart from about 50mm of edge on that nearside where it was bald. Still legal but so unsightly I had to keep remembering to park with the wheels straight ahead!

Although I appreciate that the mileage isn't a all bad for the tyres, I remain perplexed about the uneven wear and particularly as my MB dealer confirmed that then camber reading was fine. My tyre dealer says he often sees this wear. Many say this is due to roundabouts etc but a third of my mileage is abroad!

With the new tyres I intend to swap the fronts every 10K miles to even out the wear a bit.

 

[television]

Some makes of tyre can self destruct when past the ½ wear, Pirelli and Conti are known for this.

 

[dsharples]

E300 Hybrid Rear Tyre Wear

I note this thread's been quiet for some time, but there are quite a few posts about the E300 hybrid. I've owned my E300 Hybrid AMG-line Estate for almost a year, but last week came across some very unusual wear on the rear tyres, where the last cm or so of inner shoulder was worn down to the belting. The remainder of the tread was 4-6mm in depth. Is this usual?

 

[eman]

Both my front tyres on the ML have worn the outside edge about 10mm in. Mb said it's the way the wheels turn outwards on full lock mmm. When the new tyres are fitted i will get the alignment checked

 

[JBell]

Mb said it's the way the wheels turn outwards on full lock mmm.

This is part of it, MB do angle the wheels on lock more than any other brand and tend to wear the edges of front tyres more

 

[Tim Wattison]

I have a new 2017 C300 Coupe running on 19", ive noticed that the front nearside tyre has more wear on the outside edge. The car has covered only 8300 miles. It's running with Pirelli P Zero's. It does not pull in any direction either. The recommended pressures all round say 36 from looking in the fuel filler cap lid, I had to inflate the fronts recently as they had dropped to about 31 and I had a tyre low pressure warning come up, the middle of the nearside tyre was not overly worn just the outside shoulder, im wondering whether it's a camber of toe issue ?

 

[survey]

I have several posts on this thread. Come to the conclusion that type of tyre affects wear on outer edge of front tyres. Continentals a nightmare. Best so far is Kumho with very little outer edge wear.

 

[John Laidlaw]

^ me too, MB set up is such that the tyres/wheels follow the road camber and most cars will pull left a little, sensitivity is the tyres. I've P Zero on at the moment with decent tread left but for sure I'll be changing to another brand when the time comes. Likely Goodyear..
That said I'll be going Vredestein for my winters so they are likely to be on first!

 

[JBell]

Best so far is Kumho with very little outer edge wear.

My Uniroyals wear very evenly but I do keep them 2pis under the recommended

 

[John Laidlaw]

Same with mine Jon, 2-3psi under works nicely. I'm checking manually as the TPMS system doesn't seem to bear any relation whatsoever to my real tyre pressures...

 

[LostKiwi]

My Uniroyals wear very evenly but I do keep them 2pis under the recommended

Mine on the 129 wear nice and evenly on the rear but the fronts have worn the outer edges. That said I know there is a toe-in problem on the car which needs addressing but everything is seized solid so just waiting now for the time/weather/inclination to get under it and learn a few new swear words!

 

[oigle]

If the tyres are run at very high pressures, this will enable the car to wander more, and the same for 1 too low, it will pull to that side.

Too true. Strangely, some tyres seem to be "heavier" than others too. I have seen cars, that pull one way, have front wheels exchanged side to side and the problem goes away or can even transfer to the other side.

 

[warmrain]

The outside edge of my front nearside tyre is completely worn with the remainder showing an even depth of approx 3 to 3.5mm. The offside tyre is wearing on its inner edge. These are Continentals and have covered 30,000 miles. I pointed this out to my dealer who tells me that this wear is normal with all E and C Class platforms. However I am not so sure. As a new set of tyres is on the horizon, I just wonder if my tracking needs checking and I assume this isn't covered by the car's warranty although I had mentioned this uneven wear to my supplying dealer early o in the car's life.

An old thread but my thoughts on this asymmetric wear pattern is that perhaps your Thrust Angle is too far off zero. [This is when your rear wheels point one way and the fronts point the other way.]

ie.

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Total toe front & back may be correct but your car tries to 'crab walk'. Especially with drive from rear wheels..