Check Your Tires!

[gtm]

What % of mileage do you drive in Normal vs. Sport vs. SportPlus? Which one do you use at highway speeds?

I let the car set the suspension height. 99% of the time I drive in the Normal Drive Mode and Normal Chassis settings. At highway speeds it drops the chassis height one setting to "lowered". Other than some miles experimenting I do not use range/sport/sport plus/low. A reasonable guess is that the car is in the "lowered" setting 60+% of the miles driving relatively straight on the highway. I monitor the tire pressures and try to drive sanely and safely, so 5,000 lbs of weight aside, pretty low stress on the tires.

Contrary to multiple reports of heavy inner edge wear my tires had none. Very even wear across the tread surface with slightly more wear in the center. Rear pressure might have been a little high so I've dropped from 39 to 37 psi in the rear.

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[gtm]

Total mileage is ~9800mi. 305s out back, 99% sure it's the P-Zero. Lot of low speed around the suburbs driving (my commute leaves the highway for city streets pretty quickly). Wish I could say the wear is from launch control at every light, but with this traffic it feels like half my miles are from sitting still ??

21" wheels and 305 mm wide tires seem to be asking for frequent replacement. City streets and tight turns, even at low speeds, aren't going to help with long wear. Maybe look into a bulk buy for a volume discount?

 

[JIP1080]

21" wheels and 305 mm wide tires seem to be asking for frequent replacement. City streets and tight turns, even at low speeds, aren't going to help with long wear. Maybe look into a bulk buy for a volume discount?

Think my wife is going to kill me if I start adding road car tires as a bulk expense next to the racecar tires ?

 

[f1eng]

I run my tyres at the "loaded" pressures to better resist pothole damage.

 

[whitex]

21" wheels and 305 mm wide tires seem to be asking for frequent replacement. City streets and tight turns, even at low speeds, aren't going to help with long wear. Maybe look into a bulk buy for a volume discount?

I wonder if RAS helps with rear wear.

 

[gtm]

I wonder if RAS helps with rear wear.

Certainly possible as I do have that on my car.

 

[JIP1080]

I wonder if RAS helps with rear wear.

Not in my case lol. I have RAS and still have the wear issue.

 

[Midlifecrisis]

I run my tyres at the "loaded" pressures to better resist pothole damage.

It will be interesting to know if the higher pressures result in more central wear over time with loss of tread in the middle of the tyre. I don’t know how high the pressures would need to be to see this though

 

[f1eng]

It will be interesting to know if the higher pressures result in more central wear over time with loss of tread in the middle of the tyre. I don’t know how high the pressures would need to be to see this though

Not impossible but fairly unlikely on low profile radials which normally have a fairly stiff belt.
The contact patch will be smaller (shorter) so less grip though again probably by not much.
On the racing cars we ran the lowest pressure which could take the load, which varied between makers and also whether there was a "tyre war" on.
The tyres we got from Michelin when other makers could compete were much more complex and expensive than when it became a single make series!

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