Michelin PSS 225/40 ZR18 92Y XL vs stock 225/40/ ZR18 88Y |
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04-01-2017, 04:25 PM | #1 |
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Michelin PSS 225/40 ZR18 92Y XL vs stock 225/40/ ZR18 88Y
I came across the information on the Michelin website that there are actually 2 versions of the Michelin Pilot Super Sport tire in 225/40/18 size.
The one that comes from factory (BMW) is 225/40/ ZR18 88Y. There also exists 225/40 ZR18 92Y XL. I wonder if on a staggered setup (225/40/18 front 245/35/18 rear) replacing the stock front tire with the one that has a higher (92) load rating and XL sidewall (probably/hopefully more rigid) will have a significant effect on a) outside tread premature wear b) understeer c) handling of the car in general. Any suggestions? |
04-01-2017, 08:05 PM | #2 |
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You want the tire with the star on the sidewall, It's the BMW spec tire.
If you don't need immediate replacement i'd wait for the PSS4S they are in the process of releasing them. the specs are improved. |
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04-01-2017, 08:14 PM | #3 | |
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c) If the sidewalls are stiffer with a 92XL rating ,turn in should undoubtedly be better. |
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04-02-2017, 05:41 AM | #4 | |
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What I would like is a) a tad bit grippier front tire, b) a bit less outside wear, c) a bit sharper steering. I wonder if that tire can help that or not. |
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04-02-2017, 01:39 PM | #5 | ||
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No detectable difference at least for me. There is certainly no issue with driving with the higher load rating. I am also driving with front pressure up to 35/36 PSI to mitigate understeer and wear. Not sure if that helps any either.
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04-02-2017, 07:40 PM | #6 | |
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ps: I, too, run higher front tire pressures. plus, I made a little less toe-in (0.04 instead of 0.07). |
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04-12-2017, 01:05 PM | #7 |
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I've seen several comments that the best, perhaps only fix for that outside scrubbing is more camber, especially via the 4-series lower control arms - not sure you can do that to an x-drive, though.
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04-12-2017, 05:56 PM | #8 |
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04-12-2017, 09:42 PM | #9 |
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Just an observation: the stock 225/40/ ZR18 88Y Michelin PSS tire has a kind of slanted/sloped outer edge when completely new, tread on the outside already not as deep as on the inside, plus the soft outside sidewall, so no wonder it has an issue with premature outside tread wear.
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04-13-2017, 11:53 AM | #10 | |
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Anyone worried about handling and tire wear might consider getting an alignment even if you haven't hit any major pot holes. Although my stock staggered setup lasted 13,000 miles, the front and back tires were ground on the outside corners while the center and inside still had a lot of tread, I guess like all of these cars :-(. I'm curious to find out if the Dinan springs, new alignment and new MPS4 S tires will make any difference in wear pattern...fingers crossed. It definitely feels like the front has less plowing into corners now. Last edited by AlpsRider; 04-13-2017 at 11:59 AM.. |
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04-13-2017, 12:45 PM | #11 |
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So are you are noticing changes just from the improved alignment, or did you add the parts too at the same time? In other words, was that a noticeable improvement for driving?
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04-13-2017, 12:57 PM | #12 |
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Unfortunately, I added the wheels, tires, Dinan springs and alignment done all at the same time. Also, because of the Dinan springs the front negative camber is at -1.0 now, hopefully that will help with front tire wear a bit.
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04-13-2017, 07:38 PM | #13 |
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I ran Pirelli P Zero last season and the fronts (225/40/18) were wider than the Michelins of the same size, their outer edge is more "square" and the sidewall is definitely stiffer. I didn't notice nearly as much outside wear with a more conservative alignment as it is now with the Michelins. and I've only had the Michelins for about a month but I can already see the scrub marks on the outside oh so clearly. The Michelins are certainly more comfortable, though. Stickier? Probably. At least in cold temperatures. Too early to tell, though, since we haven't had really warm weather yet but there's less understeer and the car feels more agile in tight corners or when changing direction. Wheel alignment is not an expensive procedure where I live so I do it 2-3 times a season, either to fine-tune the handling characteristics or just in case... and yes, every time it's a bit off from what it was set to be on a previous alignment.
Last edited by x233; 04-17-2017 at 06:58 PM.. |
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06-23-2018, 09:29 PM | #14 | |
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The 92Y XL version is about 5 mm wider than the 88Y tire when put side by side. Also, the 88Y has a kind of slanted outer edge even when completely new so it looks kind of used even if it's never done a single mile. The 92Y XL version does not have that and its outer edge is more solid and square. The 92Y XL feels a bit heavier. I think that maybe BMW chose the 88Y tire because it's more comfortable and lighter. I can feel it on less than perfect roads, it's not too much to make a fuss about it but it's certainly there. The steering is a bit heavier and a bit more planted, a bit more direct, the difference is not huge but it's there. There is less of that empty feel at the steering wheel that's present with the 88Y front tires. The car is a bit more planted at high speeds, too. Having said that, I think that maybe the BMW-specced (softer) tire is still a better choice for the city for most people because it's more comfortable and refined. The front end (with 92Y XL tires) is a bit more stable/planted when cornering hard and now it feels like the rear begins its sideways slip earlier than before - there is less understeer (maybe it would be less noticeable if the rears were completely new, too). I used to run higher pressures for the fronts and now I run equal front/rear tire pressures. I would actually prefer to have a bit harder rear tires now Last edited by x233; 06-23-2018 at 09:43 PM.. |
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07-23-2018, 12:12 PM | #15 |
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My 88Y fronts were shot at 6,000 miles and I only do 1-5 mile city trips. Got an alignment at 6,000miles and no adjustments they were in spec. I actually beleive that a lot of city driving with a lot of turns just kills these fronts. Just ordered the 92Y’s from my dealer since the rears are 92Y anyway. Dealer agreed to go none spec because of the wear problem. Checking the 4S specs shows they are 92Y also for fronts. At 3-4,000 miles I started keeping them at 35-36 psi to extend the wear but I’m completely through the tread into the belt on the right front at 13,000 (2014 model all city driving). My rears could probably go another 10,000 but I’m replacing them. BMW has a special going so I’ll give the PSS another shot and Costco was a 2 week wait for the 4S.
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07-26-2018, 07:28 AM | #16 | |
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I'm sure there are other differences too, as you have mentioned. |
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07-27-2018, 06:26 PM | #17 |
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I talked to 3 different people at Michelin and they really need some people in customer service that can read a spec sheet or answer basic questions. The net of 3 conversations was 3/10’s of a pound heavier, 10/32 tread depth vs 9/32 for 88Y and slightly thicker side wall. Don’t kill the messenger this is the only consistent answer I could get but who knows if its true. Like I did point out earlier, the new 4S is 92Y also for the fronts so it will probably be a little stiffer ride than the 88Y MPSS also.
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11-17-2020, 08:27 AM | #18 | |
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11-18-2020, 04:59 PM | #19 | |
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Last edited by x233; 11-18-2020 at 05:06 PM.. |
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