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Finally, got the Michelin Pilot Sport 4S (XL) on today. I only drove it around 15 miles back home after that. The tires are very new so they have not broken in yet. I will write a detailed review once I have "learned" these tires and played with the tire pressure a bit. The shop put them at only 34 psi front and back (indicated in the cluster) so I have to play with a few different combinations (36/36, 36/38 and 37/39 would be my three other ones) and simply break them in. I really was surprised by how quiet they are. Will have more later.
Finally, got the Michelin Pilot Sport 4S (XL) on today. I only drove it around 15 miles back home after that. The tires are very new so they have not broken in yet. I will write a detailed review once I have "learned" these tires and played with the tire pressure a bit. The shop put them at only 34 psi front and back (indicated in the cluster) so I have to play with a few different combinations (36/36, 36/38 and 37/39 would be my three other ones) and simply break them in. I really was surprised by how quiet they are. Will have more later.
38 front and 40 rear works well on my set up, but I run 275/35 front and 305/30 rears for my XL’s
38 front and 40 rear works well on my set up, but I run 275/35 front and 305/30 rears for my XL’s
Exactly. I had set on my MPSS 37F/39R. It really worked well with a sharp/responsive feel and also more road feel is telegraphed through the steering. I am going to go directly to 38F/40R on the Pilot Sport 4S. Should be much better than my OEM MPSS. Cheers!
You’re gonna love them Rolla. Best tire for combination and grip and their customer service is second to none.
Yeah, I hope so. Michelin has never disappointed me (been disappointed in Kumho, BF Goodrich, Continental etc. in the past on my C-XRS) I really want to go in the garage and adjust the tire pressure to 37F/39R and go for a drive LOL
Just too busy with kids and family stuff. Will try to get out in the next few days and rack up some miles on it so that I can write a review on them.
Yeah, I hope so. Michelin has never disappointed me (been disappointed in Kumho, BF Goodrich, Continental etc. in the past on my C-XRS) I really want to go in the garage and adjust the tire pressure to 37F/39R and go for a drive LOL
Just too busy with kids and family stuff. Will try to get out in the next few days and rack up some miles on it so that I can write a review on them.
I have been running MPS4S (XL) tires for over a year at the track (OEM RCF sizes). In my experience, best handling is at 39 PSI when hot. For track purposes, that means ~33 PSI cold, so I wouldn't go any higher than 37 PSI cold for regular street driving. I use same pressure front & rear, but I have other suspension mods to help mitigate the RCF's inherent understeer. Without those, I would too go 1-2 PSI lower in the fronts (e.g., Front 35 PSI / Rear 37 PSI Cold). My two cents... Have fun!!
Thanks. Since it does not get that hot here, usually I see only a 1 - 2 PSI increase when I am driving on the streets (even with a few hard turns or accelerations here and there). On the OEM PSS, I was running 37 PSI front and 39 PSI rear cold. Max I would see it going to 39 PSI front and 41 PSI rear. I will try the same one's on the new Sport 4S. I do notice the look of these tires is more "square" on the shoulders than the "rounded" look of the OEM Super Sport. Also, the shoulder blocks seem quite a lot bigger than the OEM Super Sport.
Michelin makes these tires so well balanced that the tire shop told me, the balancing came out to zero when they installed the tires on wheels. Essentially, they did not even have to put any weights to adjust the weight. It is the first time I have seen where there are no weights needed to balance the wheels because the tires were balanced so perfectly on the wheel right out of the box. Cheers!
Originally Posted by RaulTX
I have been running MPS4S (XL) tires for over a year at the track (OEM RCF sizes). In my experience, best handling is at 39 PSI when hot. For track purposes, that means ~33 PSI cold, so I wouldn't go any higher than 37 PSI cold for regular street driving. I use same pressure front & rear, but I have other suspension mods to help mitigate the RCF's inherent understeer. Without those, I would too go 1-2 PSI lower in the fronts (e.g., Front 35 PSI / Rear 37 PSI Cold). My two cents... Have fun!!
Some pictures of the Michelin Pilot Sport 4S XL tires in the OEM 255/35 and 275/35 size. Definitely, have a beefier look than the OEM Michelin Pilot Super Sport. Also, the sidewalls are more "squared" rather than the "rounded" look of the OEM PSS. Also, the shoulder blocks are significantly bigger than the OEM PSS tires. An unintended advantage of the beefier look is, they fill the wheel gap out very nicely. Definitely, less gap especially at the front.
Hoping to write an initial review of these in the next few days.
they fill the wheel gap out very nicely. Definitely, less gap especially at the front.
Your replacement tires have the same dimensions is your old OEM tires, except for minimal tread width differences. however, over time any tire loses OD because of wear. Your old tires had a new tread depth of 10/32, 5/16". So with wear if you lost 4/16, ¼" in tread depth that would correspond to ½" reduction in OD. That's what you are noticing. Your new PS4S will do the same thing I've attached some charts showing the differences in sizing between the 255/35/19 and 275/35/19 in both the PSS and PS4S tires. the first two charts are the PSS the second two the PS4S. The ones marked "SL" are the Lexus spec RCF and GSF tires.
PSS
PS4S
You'll notice they also make these sizes in BMW and Mercedes OEM spec. The tires on my LC are BMW spec in front and Mercedes spec in back.
Yes I totally understand that. Mne are also off-the-shelf for some other brand. Not sure which one? I realize that I have a lot more tread depth right now compared to my worn out Pilot Super Sport, which is why they fill out the wheel gap more. However, the design of the blocks is so different as well. The shoulder blocks on the Pilot Sport 4S are huge compared to the previous Pilot Super Sport I had, which were much smaller in length/width. It could be an extra load feature as the RCF-Spec SL PS4S don't have similar big shoulder blocks. We will see how that translates to precision on the road and also feel through the steering etc.
Also, the sidewalls are more "squared" rather than the "rounded" look of the OEM PSS.
They're not really squared. They're actually slanted inward toward the road which give them more rigidity on the turns and at the same time a softer feel on straight road. Good thing that you didn't go for 275 and 295 as you once considered because you would lose that characteristic.
04-27-20, 01:53 PM
I've attached some charts showing the differences in sizing between the 255/35/19 and 275/35/19 in both the PSS and PS4S tires. the first two charts are the PSS the second two the PS4S. The ones marked "SL" are the Lexus spec RCF and GSF tires.
