PICS what's wrong with 812 front tire wear?

I feel a Days of Thunder teachable moment here.

His way, my way……




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What was your camber set to for at the front?

It appears it was set to neutral or maybe positive. The tires need to have some negative camber so it does not ride on the outside edge in the turns.

The inside tire edge appears relatively untouched, if so, that would indicate they were not on the ground as often as the outside edge.

Even though those fronts are a healthy 102 load rating, it was too much if riding on them without any negative camber and they chunked/lost tread.

For the next track event, find an alignment shop that can do a 'track alignment' (i.e. because they do that so often they are very familiar with what to watch for) But tell them not too much negative camber as you want the car to be streetable too. Too much negative camber and the inside edge will quickly wear with regular street driving.

 

In my humble opinion, you are seeing the results of severe understeer… which I would expect from a front mid engine V 12 Ferrari.

I think that a day at the track will wreck havoc on any street tire.

more importantly though, it looks like you had a lot of fun!

 

the rubber looks melted, not worn.

 

Those seem good, but, I do wonder, was the camber actually set to +1.1 degrees?

Do you have a printout of the alignment? If so, that would likely be accurate as the alignment machine measured the values.

For example:

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If whoever did the alignment just wrote it down then I would definitely have it checked/verified.

 

If the camber is still -1.1 (might have dealer verify) then it appears the tires have sort of defect in the bonding of the tread to the tire shell, might check with Michelin on that(actually check via the dealer the tires were purchased).

 

Those tires were over heated and over driven.

Lots of understeer and the tires grained and heated and the driver kept on pushing the front through the corners muscling the car around the track. In other words tire abuse.

Not being in the car none of us know how the car was driven and if braking, turn in, apex, track out was proper. I’ve instructed many people that will not have a car balanced through a corner and muscle it through and over drive and the tires can’t take it. This is my assumption of why these tires look like this.

-1 degree is not much negative camber. If I feel the front end pushing in a corner I do not over drive the car. I find the balance then I work on alignment, tire pressures sway at setting if adjustable and ride height to get more front end grip …again with out over driving the car.

 

So....... not tire problem, but diver input, correct?

 

Was traction control on (which setting)? With the tires scrubbed into death, i am curious what the rear carbon rotors look like. I suspect those brakes were firing often trying to try and correct the lack of yaw from understeer.


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On a heavy front engined V12 the load on the outside of the exterior front tyre is huge - I had Pirelli front tyres quickly destroyed on my 599. All the weight and directional power rely on almost a single tyre in a corner...

 

Mine is only one tire front passenger that was damaged when I brought to PPIR pikes peak intl raceway Image Unavailable, Please Login


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That is scary with the cords shown. I’m not sure I would have the cajones to drive a tire anywhere near that close to failure….


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As soon as we noticed that one tire damaged then we stopped the lapping …. Get new tire then track again at different place the following week then brake pads worn out thus need to replaced all fours…. Glad the season is over this year so time to save money for next year


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