[Kief]

Originally Posted by Chief Orman

Well after a couple of weeks I am kind of happy with the Michelin pilot 4 A/S.

Good:

Quieter
Better rubber with better grip
All around refinement
Never seem to have to add air
Wet performance light years better

Bad

More roll

And I am surprised by given all I got, how much I miss the slot car aspect with the stiffer sidewalls on the Allenza

Hmm…so would you revert back to 245/40/21; 275/35/21 rft summers when these wear out?

I've read a couple of members running 255/40/21; 295/35/21 Mich AS comment negatively about turn in response

[ASAP]

lol the bad is what ive tried to explain to numerous people here already

[Kief]

Originally Posted by ASAP

lol the bad is what ive tried to explain to numerous people here already

Maybe I should change my Brooklyn Grey build with 718M to your spec with 699M and put an end to this crazy talk! Lol I have never been a fan of black wheels, but there's something about BG and 699Ms that looks awesome…but then I would just be swapping out the 20" rft to DWS which are known to have softer sidewalls anyway…first world problems!! SMH

[ASAP]

Originally Posted by Kief

Maybe I should change my Brooklyn Grey build with 718M to your spec with 699M and put an end to this crazy talk! Lol I have never been a fan of black wheels, but there's something about BG and 699Ms that looks awesome…but then I would just be swapping out the 20" rft to DWS which are known to have softer sidewalls anyway…first world problems!! SMH

I would never swap the stock RFT tires on this car to non RFT all seasons... the only tire I would consider as a replacement is a Michelin PS4S which is a true performance tire and is more comfortable, grips better and wears better however it has softer sidewalls so there has to be an understanding that even with those tires the car won't feel the same.

I think anyone that lives above say GA... should have specced the All season RFT however then you are stuck with 19s... but all in all, the right answer is just to have 2 sets of wheels if you live in true winter conditions.

[CatSpare]

Originally Posted by Chief Orman

Well after a couple of weeks I am kind of happy with the Michelin Pilot 4 A/S.

Good:
Quieter
Better rubber with better grip
All around refinement
Never seem to have to add air
Wet performance light years better

Bad
More roll

And I am surprised by given all I got, how much I miss the slot car aspect with the stiffer sidewalls on the Allenza

You may want to experiment with >100mph tire pressures. You might regain some "slot car"feel. ymmv - CS

PS - I sold my oem RF's at 300mi & mounted Michelin PAS4S ;^)

"If your X5 is wallowing with non-run-flats, you can put more air in them. BMW's recommended pressures for <100 MPH are not ideal for even tire wear. They're for ride quality and for maintaining adhesion to the road when going over discontinuities (expansion joints, etc.) The recommended pressures for >100 MPH are closer to what's needed for even tire wear and no wallowing. Non-run-flats at the >100 MPH pressures will likely ride better than the run-flats at the <100 MPH pressures"

from https://www.bimmerfest.com/threads/r.../post-13638154

[doug_999]

Originally Posted by BimmerXdrive

I know RFTs have their negatives but on the positive side are they stronger more durable at road abuse potholes etc over Non RFT ?

When a RFT encounters a large pothole, the sidewall breaks and a bubble forms in the sidewall (plus your fillings fall out).

So not necessarily better for potholes.

[CatSpare]

[brettl]

For those who like details, I just noticed this on the tread of my conti's.

[Navypilot]

I have 699 20” staggered rims on my 22 M40i. Has anyone looked at the Bridgestone Turanza All Season run flat? I like the idea of driving 50 miles or being able to get off I-95. I don’t like the ride of my Alenza RFT.

[jsh139]

Those DWS letters are also carved in at different depths. So, as the tire wears, the letters disappear, indicating for what the tire is still safely capable.

D - Dry
W - Wet
S - Snow

https://continentaltire.com/learn/wh...iew-indicators

[Flippco]

Originally Posted by jsh139

Those DWS letters are also carved in at different depths. So, as the tire wears, the letters disappear, indicating for what the tire is still safely capable.

D - Dry
W - Wet
S - Snow

https://continentaltire.com/learn/wh...iew-indicators

You learn something new every day!

[spangle1980]

Originally Posted by jsh139

Those DWS letters are also carved in at different depths. So, as the tire wears, the letters disappear, indicating for what the tire is still safely capable.

D - Dry
W - Wet
S - Snow

https://continentaltire.com/learn/wh...iew-indicators

I WOULD buy that for a dollar!

Noice!

[Stone_M6]

Originally Posted by Chief Orman

Well after a couple of weeks I am kind of happy with the Michelin pilot 4 A/S.

Good:

Quieter
Better rubber with better grip
All around refinement
Never seem to have to add air
Wet performance light years better

Bad

More roll

And I am surprised by given all I got, how much I miss the slot car aspect with the stiffer sidewalls on the Allenza

Second on the more roll aspect! I thought I was going a little crazy, haha I switched from the Pirelli RF, but I can deal with a little more roll and a way more excellent ride when I am going faster than posted speed limits.

[dmicah]

Originally Posted by ASAP

I would never swap the stock RFT tires on this car to non RFT all seasons... the only tire I would consider as a replacement is a Michelin PS4S which is a true performance tire and is more comfortable, grips better and wears better however it has softer sidewalls so there has to be an understanding that even with those tires the car won't feel the same.

I think anyone that lives above say GA... should have specced the All season RFT however then you are stuck with 19s... but all in all, the right answer is just to have 2 sets of wheels if you live in true winter conditions.

Yeah, I think we're confusing two different axes in this discussion:

• RFT vs. not RFT
• Summer vs. All Season

WRT RFT vs regular tires, I'm a strong advocate for ditching RFTs and toting a spare or some mobility kit solution. My experience is that if you have a spare, that magically prevents you from ever needing it.

I agree with your statements above re: how to approach the issue of summer vs all season (in most cases). It's better to have two sets of wheels, one for summer and one for winter. I'm not doing that anymore because I just don't want to consume garage space in my current situation. And for me, the A/S 4's are the right solution out here in the desert where my family might occasionally end up up in big bear. They're great tires (and the OEM tires for the C8 corvette, I might add (unless you get the Z51 package)). I have the PS4S on my sedan and wow, it's an amazing handling tire! Agree with your assessment about grip and comfort.

[gugin]

My car has 19 inch wheels fitted with Bridgestone Dueler H/P Sport A/S 245/50R19 105H run-flats, which I don't particularly like. I will soon be in for a tire change and expect that the service advisor will simply recommend the same tire. I don't really care about the run flat technology; I am able to change a tire "in the wild."

I'd like to get the Michelin Pilot Sport All Season 4. They seem to be available in the right size for my wheels, 245/50ZR19 105Y XL BSW. But will they fit? The Michelin website says the tire is for rim width between 7.0-8.5 inches. I have no idea how wide my rims are. My crude measurement suggests about 8 inches. Or do I not need to worry about this because as long as the tire is 245/50ZR19 it will fit?

[83883]

If you have OEM 19's they are likely 7.5" wide, so that would be fine. The PS4AS are great.

[gugin]

Yes, I have OEM 19s.

[doug_999]

One more random thing from reading the manual... IF you have the M Sport Differential (Which I'm not sure anyone does), then you can NOT use 19" wheels. Found that interesting.

[335dFan]

Originally Posted by doug_999

One more random thing from reading the manual... IF you have the M Sport Differential (Which I'm not sure anyone does), then you can NOT use 19" wheels. Found that interesting.

Interesting factoid which surprises me a bit. I ordered my 2021 M40i in late 2020 and picked it up on 14 Jan 2021...with 19" wheels and M Sport Differential (and Adaptive M Suspension).

I have now located the place in the manual to which you refer. I wish I had read that before buying my Michelin Pilot Sport All Season 4 tires a few weeks ago. Now that might explain a strange sensation I have been feeling when taking a corner and then stomping on the go-pedal. A couple of times I did that and could feel the slight squirrely feeling in the steering wheel. I wonder why that is? Strange phenomenon. Now to figure out what to do about it.

[335dFan]

Originally Posted by dmicah

WRT RFT vs regular tires, I'm a strong advocate for ditching RFTs and toting a spare or some mobility kit solution. My experience is that if you have a spare, that magically prevents you from ever needing it.

I would have agreed with you until a few weeks ago when I became the outlier. I have the space saver spare. I changed out my OEM runflats to Michelin Pilot Sport All Season 4s, and then picked up a screw in my right rear within about 150 miles. I was screwed.

[335dFan]

Originally Posted by doug_999

One more random thing from reading the manual... IF you have the M Sport Differential (Which I'm not sure anyone does), then you can NOT use 19" wheels. Found that interesting.

Wouldn't it be more accurate to say that you can't use all-season tires with 19" wheels? Other tires on 19" are not mentioned as problematic.

"Safety information
Warning
If the vehicle is equipped with an M Sport differential
and all-weather tires on 19 inch rims,
this can alter handling, for instance the vehicle
may swerve off course. There may be a risk of
accident or risk of damage to property. If the
vehicle is equipped with an M Sport differential,
do not fit all-weather tires on 19 inch rims."

[335dFan]

Originally Posted by gugin

I'd like to get the Michelin Pilot Sport All Season 4. They seem to be available in the right size for my wheels, 245/50ZR19 105Y XL BSW. But will they fit? The Michelin website says the tire is for rim width between 7.0-8.5 inches. I have no idea how wide my rims are. My crude measurement suggests about 8 inches. Or do I not need to worry about this because as long as the tire is 245/50ZR19 it will fit?

Someone just pointed out something on page 295 of the 2021 model year's manual. I have 19" wheels and put on the OEM size Michelin Pilot Sport All Season 4, so fitment is not an issue. It's another problem that has caught my attention.