So I swapped out the pzeros for the michelin sports , which looked wider/bigger in the wheel wells than the pzeros, and have noticed that during slow sharp turns (mostly pulling out/in of parking spaces) i get the rubbing/grinding sounds that even kind of "juts" the car a bit. Sound also resembles what it sounds like when driving over or walking over snow and that feeling of the snow being packed down beneath you. Is it just the larger tires rubbing in the well? or one of the bearings too tight or not lubed? I have no idea but i'm taking in the shop.

 

Are the new tyres the same size (e.g. 295/30R20) as the P-Zeros?

 

Your new fronts may just be 'slipping' on sharp turns (such as parking maneuvers). Ours does that even with half worn P-Zeros.

Do F-Types have Anti-Ackerman Steering? (Where the fronts don't turn at a sufficient angle not to slip on sharp turns)

https://en.wikipedia.org/wiki/Ackerm...ering_geometry

 

That's what it sounds like to me, too. I was in an underground park a few days ago with painted floor and the squelching and chirping and groaning from the tyres (Michelins as well) was incredible. Mine are 270's on the front and 3015's on the rear, definitely no rubbing etc.

 

Jeez Bruce, they are some yuuuuge rear tyres you have there!
Two of them at that size must cover the entire width of the car, just like a steamroller!

 

lol! wishful thinking maybe

 

Bruce, were the fronts a typo as well? (265 or 275?)

 

265, I should learn not to work from memory...

 

I hope you don't forget to remember ...

What was the question?

 

I have the same noise at very slow parking lot speeds (<5mph) when maneuvering. Jaguar Columbia couldn't figure it out when I asked about it. It sounds like a rubbing tire, but nothing appears to be rubbing anywhere. It even did this with the factory Tornadoes and Pirelli's for the brief time they were on the car. I want to say it could be related to the differential, but it's just not typical of what a failed diff would sound like which is more of a 'whine' or 'clunk'. If you solve the mystery, please fill us in.

 

It could be "tyre skip".
Very common on XFs and XJs and some F-Types, especially with Pirelli tyres, happens at low speed on full lock both forward and reverse.
Doesn't happen on all of them, it usually depends on the tyres.
It's due to the steering geometry, at full lock at low speed the outer front wheel can't quite keep up with the inner front wheel and the tyre "skips".
Nothing you can do about it other than try different tyres.

 

This happens during winter time on all sports cars with wide tyres in the front. Cold temperatures harden the rubber wich causes this "problem".
Solution: fit winter tyres wich have rubber that stays soft in cold temperatures.

 

So I took the car in to the shop and they put it up on the lift and I also test drove it with the techs so they could hear it. They even called the tire place guy to confirm the same size and to get a second opinion. It was settled on "tire skip" as described by a few of you. Definitely sub freezing temps here. It's pretty jolting and scary when it happens and never did it with my P Zeros so it was quite an educational experience talking with the shop guys. Hope they're right or else I'm effed!

 

As has been said before, but needs to be underscored, these tires are not meant to be driven in subfreezing weather. I was out and about on my MPSSs on Friday morning with the temps in the mid-twenties and it was almost like driving on ice. They're good down to about 40 (even though the sidewall says 50), but that's it!

 

 

Apparently, the MP4Ss are a marked improvement over the MPSSs in the cold. At 27 degrees, the MPSSs won't hook up at all after a 1-2 shift unless you let up on the throttle.

 

eh I'm not driving the car very hard though, just an easy low speed commute (25-45). I had pzeros through last winter and drove the car all the way through (never on snow covered roads though of course) and never ever had a feeling of driving on ice (perhaps you were exaggerating to make a point which is understood). Temps in Pennsylvania are of course a solid 15-45 degrees all through winter. If the michelins are better than the p zeros then I don't think I or other people with similar driving conditions should have a problem as long as you don't drive like an *******. I refuse to switch to winter tires because of all the b.s that comes with that process and the fact i'll never drive it in the snow. Just my thoughts through experience.