Michelin Pilot Sport 4S for 360: Ordered • Installed • Fits!

28-29 all around


Sent from my iPhone using Tapatalk

 

Jeez, that seems low, the pirellis were 32 all around and the car’s data plate from 2008 says the Michelin’s 11 years ago should be 32F/35R. Newer tire, lower pressures?


Sent from my iPad using Tapatalk Pro

 

I was just about to pull the trigger on the Michelins until I read this post. I'm frustrated by the lack of options in the stock size but my fenders are perfect and I don't want to damage them. I have an 05 360 spider. Has anyone had any rubbing issues running the larger sizes? I know the rubbing can happen with the stock tires with sharp turns into steep driveways.

 

If you aren't having any rubbing issues then I will go with your recommendation. I just wanted to double check. Thanks for following up.

 

You are correct to be skeptical. I had my fenders rolled because I was getting some fender interference when out on the track and cornering near the limit. No problems now, but I’m wary when people say they have no issues with going to bigger or wider rubber. They said that about OEM sizes before I rolled the fenders, too.
I don’t want to buy expensive tires that I later find out hit my rolled fenders when driving on track. There’s really no way to know for sure until you do, as you can’t be driving that hard on public roads.
I currently have decent tread remaining and the tires don’t age-out for another year, so I may continue to wait and watch threads like this. I would be encouraged by a genuine track hound pronouncing these fit after heavy track use.


Sent from my iPad using FerrariChat

 

I found a size comparison visualizer that should help people considering this change understand the differences. It also includes how it will affect the speedometer.

REAR (Size 1 is the stock tire, Size 2 is the Michelin)

Image Unavailable, Please Login

Front in next post due to some website wierdness

 

FRONT (Size 1 is the stock tire, Size 2 is the Michelin)
Image Unavailable, Please Login

 

I measured the clearance between the stock tire and the inside fender on my 05 Spider. Here are the results:

FRONT: 1/2" (0.5") between the widest part of the tire and the inside of the fender. It would take 3.5" of vertical travel for the widest part of the tire to impact the fender.
REAR: 3/8" (.375") between the widest part of the tire and the inside of the fender. It would take 4" of vertical travel for the widest part of the tire to impact the fender.

With such a small gap I'm not surprised so many people have had issues with the tires damaging the lip of the fender.

The Michelin tires are 0.4" wider front and rear so you pretty much lose any gap you had with the stock tires and that is with the wheels straight. The Michelin is 1/2 shorter so you get that extra vertical travel distance.

I hope this information is helpful for anyone considering this tire swap.

 

I recently got some new rubber for my 430 had Bridgestone with again with Bridgestone these are my new one so far very happy with them
Image Unavailable, Please Login Image Unavailable, Please Login

 

Careful, all tires are not created equally by manufacturer. The numbers can vary significantly for same tire size.

 

Thanks for that. I had no idea there could be variations in the sizes.

 

Don’t worry and go with 225/40 and 285/35 in the 4S you will NOT HAVE any issues.
Stop using the calculator and use other members experience with them.


Sent from my iPhone using Tapatalk

 

My previous tires were Potenza RE-11 in OEM sizes. Really liked the tires handling characteristics but had constant problems with fender rubbing. The new 4S on the other hand, have had no issues. This in about 2500 miles which included some spirited mountain driving.

 

That’s great info, because my current tires are RE-11 in OEM sizes.


Sent from my iPad using FerrariChat

 

Bringing this thread back, too. I am so indecisive. I’m leaning towards the PS4S again.


Sent from my iPhone using FerrariChat

 

I replaced my worn Potenza RE-11 with the Michelin PS4S (225/40R18 & 285/35R18) end of last July. 2004 F1 360 Modena. A tick under 40k miles.

No ABS warning light after installation.

Very comfortable ride. Felt "softer". But that could just be compared to the worn tires

$1015.96 at Tire Rack shipped to my mechanic (no sales tax here in OR). $120 to mount, balance & rotate. There's a disposal fee and alignment cost somewhere on the bill...

 

So after time has passed, any issues running these sizes and tires?


Sent from my iPad using FerrariChat

 

I posted earlier no problems after 2500 miles. Now at 6500 miles and still no problems. These tires are superb. Great handling and much quieter than the previously installed RE-11. We just took a road trip to Palm Springs through the mountains. Super handling on a challenging drive in below freezing temps, then quiet and comfortable on the dead straight run across the desert. Handling in the rain has also been very good, including no hydroplaning on our god-awful freeways. Hope this helps.

 

Awesome feedback. Thanks so much. I’m going with the PS4S.


Sent from my iPhone using FerrariChat

 

If the size of the tire affects the speedometer reading, I assume it also affects the odometer reading?

 

Probably, but it’s only under 3% more based on revs per mile. I can live with that.


Sent from my iPhone using FerrariChat

 

Are these the tires people are talking about in this thread?

Image Unavailable, Please Login

 

BTW, if you order from TireRack, be prepared to receive an “are you sure” about the sizes email, since they are a departure from OEM. Not a big deal, just tell them you did not make a mistake and be sure to double check your sizes when ordering so you don’t get stuck with the wrong sizes due to your own error.


Sent from my iPhone using FerrariChat