Uneven tyre wear - Ford C-Max Forum
 
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post #1 of 9 Old 12-02-2011, 09:24 PM Thread Starter
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I put new tyres on my cmax and kept the front as it still has a few mm
of treads left but I noticed it has uneven wear on the inner side.

They were on the back for about 9000miles and on the front for about
4000miles, I keep a close enough watch on tyres, keep them at the right
pressure and the wear across the actual treads seem fairly even, as you
can see from the photos its only on the inner edge.



So have you guys any idea if I need to do anything about this? I'd guess
its the alignment but I'm not sure, I had to fit a new tyre on the
other front side about 1500-2000 miles ago but I don't think this would
cause it, maybe its just from cornering.



inside



outside




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post #2 of 9 Old 12-02-2011, 10:15 PM
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There are several things which can cause uneven tyre wear. The biggest culprit, as you rightly say, is poor wheel alignment. If the front wheels are toed in too far, they tyres will generally wear on the outside edges. This can also be a result of enthusiastic cornering! If the front wheels are toed out the tyres will wear on their inside edges. Generally speaking, if tyres which have been subjected to an uneven wear pattern on the front, are then moved to the rear, where wear SHOULD be more even across the tyre, the wear will not "even up", but continue as it has begun, but evenly, if you follow.
However, that is not the full story. Some vehicles have fully adjustable front AND rear alignment which must be set, on a laser jig, to the manufacturers spec. I don't know if the Focus (and by default the C-Max) falls into this category as I have not had mine long enough to find things like that out.
Tyres which are under or over inflated will also wear unevenly. Under inflated on the outside. Over inflated in a ring around the centre of the tread. If a tyre which has been subjected to overloading on the rear axle is then moved to a poorly aligned front axle it is a recipe for uneven wear. However, as I don't know you, or your driving habits, I cannot say exactly what may be causing the uneven tyre wear. I am just making you aware of the pitfalls.
So, as you can see, there are many things which may be causing your problem. The first thing to check is your tyre pressures. Also, are you in the habit of occasionally carrying heavy loads? Unless you change the tyre pressures to cope with the extra load, it could cause "under inflation" problems to start.
If you are concerned that wheel alignment may be the cause of your problems, a full four wheel alignment check at a reputable specialist will get it sorted or at least set your mind at rest. If the alignment is correct, it can only be down to inflation, loading and driving style.

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post #3 of 9 Old 12-03-2011, 10:27 AM Thread Starter
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Thanks for the reply,

I'm not a very hard driver and its usually only myself in the car and usually little or no load, this car does quite low mileage, the previous owner did more mileage on those tyres than me.
Do you think by the photos that its enough of a difference to get it checked now or leave until its in for a service?





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post #4 of 9 Old 12-03-2011, 10:45 AM
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If you haven't had the car long and think that the wear is down to the previous owner, then it's probably OK to leave it, but a quick alignment check won't cost much and will eliminate that possibility. I have also heard, in these pages, that the C-Max is inclined to be heavy on tyres. My own 2.0 TDCi Zetec only had 14,500 miles up when I bought it, but had already had the front tyres replaced! I can't ever recall having a car before which ate tyres at that rate!!


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post #5 of 9 Old 12-03-2011, 10:58 AM Thread Starter
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They do seem to eat front tyres very quick, suppose it down to the 2.0 weight.

I might get an alignment done in the new year just to see.

Thanks again.



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post #6 of 9 Old 12-03-2011, 11:27 AM
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My last five cars before this one have all been diesels. A Montego 2.0 TD, Xantia 1.9D, Xantia 1.9 TD, Xantia 2.0 HDi 110, and a Xsara Picasso 2.0 HDi 90. None of them went through front tyres at that rate, and Citroens and Peugeots fitted with the same engine are not similarly afflicted. Also I can't imagine the 2.0 is that much heavier than a 1.8!


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post #7 of 9 Old 12-03-2011, 05:27 PM Thread Starter
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Maybe its the tyres so, Conti tyres seem to be common factory fits, its what mine were, I switched to Goodyear so time will tell, conti seem to wear very quick on some cars and not on others.

I suppose it may just be the cmax themselves either.

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post #8 of 9 Old 12-04-2011, 05:05 PM
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The Conti's don't seem to last
I've had Goodyear on the front of a 1.6 Diesel for most of it's time with us and they seem OK for longevity. They are however pumped up to 36 psi which seems to also help with the MPG




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post #9 of 9 Old 12-05-2011, 08:51 PM Thread Starter
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Do you find you lose any grip or handling with the higher psi? My recommended is 33 allround.


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