Just wondering about changing tires when worn. It seems this car wears rear tires faster than fronts. So when the rears need replacements, do you replace both axles, all 4 tires, or just those rears and run the fronts longer?

 

Since I switched from P-Zeros to MPSS, I changed all 4, though the fronts easily had another 5K in them. Someone recently said they left the front PZs on, and put MPSS on the rear. Personally, I wouldn't mix and match though I have no idea to what extent it would be noticeable.


To be fair, I'm guessing you only drive like a nut when you're in Maine ( ), so it probably isn't critical.

 

Matt,
I agree with Dave not to mix brands/tread design if you occasionally test the traction limits (ok otherwise). However, as long as you replace both tires on each axle with the same tire design as on the other axle, you don't have to replace both axles at the same time.

 

Not sure if the OP has AWD, but what about the "urban legend" about having to replace all 4 if there is greater than 4/32 between tires or is that just malarkey

I just went through this with my wife's X5. I made the decision myself however, no one was pressuring me

 

The front are never going to wear anywhere near the rears if you are RWD. I ran Pzeros in front after changing to PSS from 10,200 miles to 17,200 miles, and other than some understeer, the two brands together were fine. Now I am all PSS, and it's great and will likely wear about 5K longer in the rear than the Pzeros, approaching 20K miles, I would expect.

 

What are PSS?

 

Michelin Pilot Super Sports.

 

Mine is a Base coupe, RWD. It came with the Conti tires on the 18 inch rims. I like them and was especially impressed with their wet road holding capability on my drive east in heavy weather in May. At that time they were pretty new with less than 8,000 miles on them. I've got 12,000 miles on them now. Tread was measured at about 2/3 worn down in the rear to a safe tread depth (3/32), and about 1/2 worn down in front. I have to check for sure but that's what I remember at the 12 month servicing. Winter is coming to Colorado soon, and I will drive it on dry road days whenever I can, but probably won't put a lot of miles on it again until spring. I think I may get 16,000+ miles on the rears before needing replacements, pretty similar to most of you with your P-zeros.

I'll be looking at new tires in the late spring, and go with MPSS most likely. I have them on my Audi A7, and I love the way they roll and grip on that car. I can imagine they'll do as well on my Jaguar.

 

- do not mix brands
- do not mix tread patterns

you want your tires tread to be as close to each other across the board as possible, which is why tire rotating is often recommended so that they all wear almost evenly.

When i was close to the end of my BMW, i didnt give a damn and was so fed up with replacing the tires (stupid runflats), all 4 corners had various tread depths, the rear ones almost worn out. I was driving approx 2 hours on a highway in the rain and you can tell that the car and traction control were confgused. you can feel the system intervening a lot because the car was AWD, fronts had grip, rear didnt

 

On the F-Type, the front and rear tires are different sizes. So rotate? No. Rotating side to side on the same axle reverses the rotational direction, which I understand should never be done. Some auto companies say don't rotate tires ever. I take your point though. I plan to replace all four tires when the first wears down to minimum safe limits. DJS, that pithy guy, has convinced me.

 

you're correct, my comment applies more towards regular cars. when you start dealing with different sizes and direction specific tires, rules start to apply less.

 

I made a brick dumb comment the other day about rotating my tires, when, of course, you can't. But the tire guys say they "cross rotate" ie rotate RWD or front tire and swap them side to side.

You are saying that if you cannot rotate all four tires, you shouldn't be crossing them?

 

some tires are directional, meaning the tread is supposed to go a certain way on a certain side. those tires cannot be cross rotated

 

I've got quite a few decades of auto experience under my belt. These last 30 years mostly BMW and AUDI. I know I read/heard/been recommended to rotate front to back tires when the same size like my Audi Q5, so tires roll in the same direction after repositioning, but never cross rotate which will reverse the rotation. I also remember at least one purchase where manufacturer said, don't rotate tires at all. Maybe some of this is witchcraft, and/or recommendations change with time, improved technology, and/or specific tires, but I never cross rotate tires.

 

Cross-rotating went out with bias-ply tires.

 

Also, directional tread patterns tend to fill with water rather than clearing it when run the wrong way round.

Which may be less of a problem for those of you living in areas with only two seasons...

 

Wore out rears, went with PSS only in the rear, about 4k later did the fronts with PSS. Absolutely no problem running PZero front and PSS rear.

 

Same deal here. Replaced my rears with Michelin PSS and left the half worn Contis on the front. I've had absolutely no issue. Did plenty of research and found no legitimate reason for concern.

I'm driving a RWD F-type, YMMV with AWD but I doubt it.

 

Can't find the edit button? Ignore the rotation comment, that's obviously not gonna work out well w/ diff sizes of tires

 

it the left-most one at the bottom right of the post.