Hot! MPSS to MPS4 tyres = AWD levels of grip

[Centurion]

Having switched from Michelin Pilot Super Sport to Michelin Pilot Sport 4 this week, I am blown away by how my LSD equipped M140i now grips like an AWD car. MPS4 defy belief. I recommend them to anyone who is currently running MPSS. ⠀
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-MPS4: No warm up required. No wheel spin on heavy throttle is applied from stand still on dry or wet roads. Corners can be approached slow in, moderate power mid-corner and full throttle after straightening up. Minimal and less frequent traction intervention. ⠀
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-MPSS: Optimal grip is available when tyres are above 35C with warm ambient AND surface. On cold or wet roads, corners have to be approached 'slow in, slow out' with gradual throttle applied after straightening. Occasional wheel spin or traction control intervention if heavy throttle is applied at low speeds.⠀

 

[Giannis]

I'm almost a year into mine. I'd say I was happier with the Bridgeston RE002 I was running before. The PS4 feels softer (as in sidewall stiffness) and the difference s quite noticeable. But my general fondness for comfort is going on with the current tyres quite well!

 

[Centurion]

I'm almost a year into mine. I'd say I was happier with the...

Other have said the same about the MPS4. I am open minded to trying other tyres next time that I am due a change.

How does tyre roar and comfort compare on the RE002?

 

[Giannis]

How does tyre roar and comfort compare on the RE002?

The PS4 is much better in both!

 

[Zafiro]

I have the Supersports and probably last next season too. My next tyre is either Pilot Sport 4 or the new Goodyear Eagle F1 SuperSport.

My car comes with 205/40 R18 but will probably go for 225/45 R18. Because 225 is a lot cheaper than 205. Many ST owners already done this.

 

[CrunchSlaughtered]

I have the Supersports and probably last next season too. My...

Is this size allowed for the car. It's wider and with higher profile, which means much bigger perimeter. If you have a LSD this could be a problem, because it will not work properly.

 

[Zafiro]

Is this size allowed for the car. It's wider a...

Shouldn't be a problem. Many ST owners already done the switch.

Edit. 225/40 it is...not 45.

 

[Centurion]

Is this size allowed for the car. It's wider a...

I thought it's only transfer cases and ESC in AWD cars that can fail if unofficial tyre sizes are used.

 

[CrunchSlaughtered]

I thought it's only transfer cases and ESC in AWD cars th...

The software counts the distance by the perimeter of the tire. If the LSD is very agresive, mounting tires with bigger diameter could lead to preliminary activation in a turn, when you don't need it.

 

[Matski]

I thought it was only if there's a difference in size between sides.

 

[CrunchSlaughtered]

I thought it was only if there's a difference in size bet...

When you have one tire slipping this difference matters a lot. Bigger tires also f*ck the ABS and ESP, because they wrongly calculate the difference between the speeds of the wheels.

 

[Centurion]

When you have one tire slipping this differenc...

Won't some ESP clever enough to recalibrate. For some AWD cars like my previous F25 X3, only premium high performance tyres were allowed to be used. These are manufactured to standard that results in tyres with a very minimal margin of error.

There can be a 2-5mm difference in size between cheaper tyres that look identical to the naked eye. This small difference can be enough to spook the transfer case and ESP in some high performance AWD cars.

 

[Matski]

For some AWD cars like my previous F25 X3, only premium high performance tyres were allowed to be used.

A friend had similar advice for his new X1 a while ago, and was told to replace all the tyres if he had one that was wearing more than the others. I was skeptical it would make that much difference, but I've no idea what the margins on tolerances on the systems are.. so...

 

[Centurion]

A friend had similar advice for his new X1 a while ago, a...

For xDrive cars, the margins for tolerance are very very small. Tyres usually have to be changed in pairs or in sets. Expensive tyres like Pzeros have quality control in manufacturing that includes discarding/recycling tyres that are outside of the margins on tolerance. Roll the dice on a cheaper set of tyre and you will risk shagging the transfer case and requiring a new set of tyres after having the transfer case repaired.

 

[CrunchSlaughtered]

Won't some ESP clever enough to recalibrate. For some AWD...

The ESP is not learning by itself. It works with the software provided. And the manufacturer provides software dedicated to work only with the allowed tire size. For different size the software becomes more complex and no producer wants that.