Extreme tire wear inside right, why?

That's a fair bit of camber and if mixed with even the slightest bit of toe out you'd accelerate inside wear in a big way.

Maybe the toe is not zero as you think.

Maybe you have worn suspension components which are allowing the toe angle to spread under brakes and corners?

Too high pressure could also be a contributor.

Mix a little bit of all three and premature wear sets in.

I'd lean towards toe being positive (out) even though you think it's neutral.

P.s. - I don't know the track but if there are long braking sections at the end of fast striaghts you'd really be loading up the front inner as the shocks compress and spread the camber out even more.

 

A little hard to tell in a photo but it does look like a toe problem.

Toe makes the tire get dragged sideways across the pavement. Just a little toe in is used for stability, making the car track straight ahead. Just a little toe out is often used to make a car turn in better but in trade for its desire to just go straight down the road.

It does not take too much toe in or out to cause real wear issues. Also if the car has been lowered or if the camber has been changed it will have a big effect on toe settings unless that was taken care of at the same time.

 

Nice video! Can't beat Harry's - it just does what it says on the tin.

For sure there's hard braking at the end of main straight and then again, from the same top speed, at the end of the second straight with the big drop you mentioned. That's hard work for tyres set at 3.5 degrees but I can't help feeling you don't have zero toe.

Looks a nice track but, plenty technical. Lot's of practice required to get the times down I'll bet.

 

Yes, of course it is the camber!!! That is the camber for the best grip but does cause major inside wear. You probably also have understeer but that is the safest set-up. You should see the inside of race tires. Either Ferrari Challenge or Porsche Cup. You need all that camber because radial tires roll under during side load. Any less camber is less grip.

 

For track use I put a set of Pirelli slicks from the Challenge series on a separate set of wheels. The car was much better at the track. All worked very well and I did not ruin a set of street tires. The other issue was tire pressure build up. I tried to keep them about 30lbs. Anything above that and understeer came back. The Stradale is set up for understeer. The front wheels are too narrow at 7.5" and the front tires are too small at 225. 235's help and trail braking into the corner puts more weight on the front tires as you turn in. The Stradale is an amazing car at the race track. Just uses a lot of tires. But anything that weighs 3000lbs is going to use tires up. Have fun and don't forget to listen to engine )

 

I ran with -3 camber and 2mm out and did find that inside front wear was much more pronounced than same camber with zero toe. The feeling is great (in the corners) and not so good on the straights (particularly high speed motorway) but wasn't worth the additional tyre wear for me anyway.

That's an extraordinary difference between two tyres one would have thought would be in roughly the same "family". I'm very surprised.

Do please report back after next trip to Rudskogen