[MikesBMW]

Wow so I changed the tire settings to AS/Winter 100mph+ and it is recommending 42 front 48psi rear. I've never considered putting that much air in tires. I don't consistently travel at those speeds but do spend a good amount of time on highway at 80-85mph with some runs up to 90-95mph. I guess with that in mind I should bump the pressures up to about 40/46psi and see what the ride is like. Really it's just the slightly muted turn in and on center feel as well as the additional body roll in on/off ramps and long S turns at speed. I assume that's due to the softer DWS sidewalls and my current 36psi all around.

[Wgosma]

Keep us posted on outcome- I'm having bit of trouble wrapping my head around 45 psi, even in your cold climate location. Sounds like a pretty firm ride to me-

ps- wear safety glasses and your protective armor vest at the gas station air compressor, that way you'll survive and be able to take the blown out tire(s) back to Discount for cheerful refund 😉
Good luck/Bill

[cwbrow2]

Originally Posted by Wgosma

Keep us posted on outcome- I'm having bit of trouble wrapping my head around 45 psi, even in your cold climate location. Sounds like a pretty firm ride to me-

ps- wear safety glasses and your protective armor vest at the gas station air compressor, that way you'll survive and be able to take the blown out tire(s) back to Discount for cheerful refund
Good luck/Bill

+1
I think MAX tire pressure for dws06 is 51. So at 46 in the rear they could possibly heat up close to max depending on climate conditions. I'm not a tire professional but me personally I would keep an eye on the tpms and adjust accordingly.

[corn18]

The max tire pressure shown on the sidewall is a cold pressure. It's ok if it goes over that once warmed up.

[Wgosma]

Originally Posted by cwbrow2

+1
I think MAX tire pressure for dws06 is 51. So at 46 in the rear they could possibly heat up close to max depending on climate conditions. I'm not a tire professional but me personally I would keep an eye on the tpms and adjust accordingly.

I was making a joke about the tire exploding....I don't think that is a potential issue. But geez at 45 or so psi he's going to really stiffen up the sidewalls/ride - I can't imagine he'll get even wear across the tread if continually running at those elevated pressure values, plus ride will certainly stiffen up.

Maybe makes sense if one is taking their car to the track for some high-speed driving, but for daily use I have to wonder....

[BillD1953]

I replaced the OEM Bridgestone Dueller Run Flats after 38,500 with a set of 4 Good Year Eagle Exhilirates.

So far, what a GREAT tire. Comfortable, quiet and yesterday on the highway I did a 75 mph snap right left dodging a piece of truck tire blowout in the middle lane.

Tires and the suspension on the M40i did it's job .

[Sportstick]

Originally Posted by Wgosma

I was making a joke about the tire exploding....I don't think that is a potential issue. But geez at 45 or so psi he's going to really stiffen up the sidewalls/ride - I can't imagine he'll get even wear across the tread if continually running at those elevated pressure values, plus ride will certainly stiffen up.

Maybe makes sense if one is taking their car to the track for some high-speed driving, but for daily use I have to wonder....

Yes, and this is a band-aid approach to a decision that turned out to be unsatisfactory. The DWS is inherently designed for a more comforting ride experience compared to the AS3+. It is simply not as performance feel oriented. Conversely, I would never try to get through an Ohio winter on AS3+ or any all season tire without at least the 3 peak symbol, as I posted earlier in this thread. I value stopping/turning capability more than just about any other attribute.

[MikesBMW]

Originally Posted by BillD1953

I replaced the OEM Bridgestone Dueller Run Flats after 38,500 with a set of 4 Good Year Eagle Exhilirates.

So far, what a GREAT tire. Comfortable, quiet and yesterday on the highway I did a 75 mph snap right left dodging a piece of truck tire blowout in the middle lane.

Tires and the suspension on the M40i did it's job .

Interested in these. Anyone know how they compare to the Conti DWS06 and Michelin Pilot A/S? Not finding a lot of reviews or any detailed ratings yet on Tirerack for the Goodyear's. Anyone else have them that can provide input on comparisons?

[MikesBMW]

Originally Posted by Sportstick

Yes, and this is a band-aid approach to a decision that turned out to be unsatisfactory. The DWS is inherently designed for a more comforting ride experience compared to the AS3+. It is simply not as performance feel oriented. Conversely, I would never try to get through an Ohio winter on AS3+ or any all season tire without at least the 3 peak symbol, as I posted earlier in this thread. I value stopping/turning capability more than just about any other attribute.

Ok you have me somewhat convinced to get another set of wheels for dedicated summers and winters.

Anyone know where to get the very best price on the OEM 19s in the cerium/ferric gray color? What's the part number? I can only find the shiny silver looking 19s for sale.

[dkreidel]

Often 19" 698's are found in the Classified section of this forum, lots of people "upgrading" to 20"-21"

If you wish to purchase new, getbmwparts.com is about as inexpensive as you will find. Look at Nokian Hakkapelitta R3 SUV for 19" winter rubber

EDIT: here's a nice set of 692's that would be perfect for winter https://x3.xbimmers.com/forums/showthread.php?t=1638286

[MikesBMW]

So I just put about 100miles on the Contis after inflating tires to recommended pressure for "all-seasons/winter" and "100mph+" (41psi front and 49psi rear)... and the ride is MUCH better! Still comfortable over bumps, noticeably firmer though, and turn in / on center at speed is way better. I'm now thinking if I keep pressures up high/at the recommended level, I'll be OK with the tires. Just never considered going that high with PSI but I guess BMW recommends it themselves so must be OK... and Conti DWS max cold pressure is 51 so I'm still safe at 48 and below.

[blschaefer1]

Originally Posted by MikesBMW

So I just put about 100miles on the Contis after inflating tires to recommended pressure for "all-seasons/winter" and "100mph+" (41psi front and 49psi rear)... and the ride is MUCH better! Still comfortable over bumps, noticeably firmer though, and turn in / on center at speed is way better. I'm now thinking if I keep pressures up high/at the recommended level, I'll be OK with the tires. Just never considered going that high with PSI but I guess BMW recommends it themselves so must be OK... and Conti DWS max cold pressure is 51 so I'm still safe at 48 and below.

Still running these pressures? I’ve got DWS06’s on 20” and trying to dial in pressures. Currently at 40 front 42 rear and seems decent.

[MikesBMW]

Dropped them down a bit to 38 front / 41 rear (cold).

[plainmaster]

Originally Posted by MikesBMW

I have a 2019 X3M40i on the factory 19s. The Pirelli tires were too harsh for my wife and I and seemed to be wearing quickly. The ride was just so bumpy even on the smaller 19s.

Went to Conti DWS 06s since I'm looking to use them as all seasons in Ohio where we do get some snow.

Initially I loved the Contis driving home from tire shop because the ride comfort is 10x better. So much more comfortable and super quiet.

But after some spirited driving and highway speeds, I feel like some of that rail tight immediate turn in is gone. Feels a little more floaty at speed. Still handles competently but not like it's on rails anymore.

Not sure what to do as I already sold the stock Pirellis. Is it possible to return / exchange tires within a week of ownership? Would the Michelin Sport A/Ss be a better compromise in improved ride comfort with some light snow traction while still having tighter steering response? Any thoughts appreciated.

I just got the Conti DWS in 20” in the same widths as the 21s, and the ride is awesome, not floaty or loose at all. If you are stuck with the 19s, that may be the problem. But the 20s are awesome.

[docal]

Originally Posted by MikesBMW

I have a 2019 X3M40i on the factory 19s. The Pirelli tires were too harsh for my wife and I and seemed to be wearing quickly. The ride was just so bumpy even on the smaller 19s.

Went to Conti DWS 06s since I'm looking to use them as all seasons in Ohio where we do get some snow.

Initially I loved the Contis driving home from tire shop because the ride comfort is 10x better. So much more comfortable and super quiet.

But after some spirited driving and highway speeds, I feel like some of that rail tight immediate turn in is gone. Feels a little more floaty at speed. Still handles competently but not like it's on rails anymore.

Not sure what to do as I already sold the stock Pirellis. Is it possible to return / exchange tires within a week of ownership? Would the Michelin Sport A/Ss be a better compromise in improved ride comfort with some light snow traction while still having tighter steering response? Any thoughts appreciated.

Experience with my 335i showed me that while my stock run flats gave me the handling, I needed a winter tire for Chicago. I learned that a no run flat (Michelin Ice) not only gave me the safety I was looking for in winter, the softer ride was way more comfortable and didn't sacrifice much in handling. Also found I didn't lose a minute sleep without a spare tire. Soooo, when the run-flats got "long in the tooth " I went for the Michelin Sport A/S 3's. Wow, they are awesome. Received my X3 M4.0 and off to my Tire Specialist to swap the summers for Continental Viking Contacts and a mobile inflation kit. Come spring, summers's go on and it'll feel like a new car again. Read every review and came to the ultimate conclusion that All-season tires are a poor choice when I'm spending 60k on a high performance vehicle. I look at it like I'm keeping my X3 for years so these tires will keep me in them for twice as long, then can go for those A/S 3's.

[Transfer]

Conti DWS have very squishy sidewalls. This is good for comfort, bad for performance. This problem will be accentuated on a 4000+ lb SUV. As others have said Michelin AS3+ will be an improvement but if you face any light snow they will be worse in that.

[pritchd]

Originally Posted by Wgosma

45 psi, hmm....that seems pretty high.
What are recommended pressures listed on door jamb sticker?

The #'s on the door jamb are for cold measurements - when you haven't driven the vehicle overnight for example. The one's showing in iDrive are based on the temperature of the tires as you are driving; these are not the same thing as the recommended cold inflation pressure.

If your idrive shows 45 psi recommended and the actual is 35, its like having them inflated to 25 psi vs. 35 when the tire is cold. Conversely, if you inflate to cold tire to the 45, it will go well into the 50's as you drive, and it will feel like the tires are solid rock in addition to accelerating tire wear.

[Wgosma]

Originally Posted by pritchd

The #'s on the door jamb are for cold measurements - when you haven't driven the vehicle overnight for example. The one's showing in iDrive are based on the temperature of the tires as you are driving; these are not the same thing as the recommended cold inflation pressure.

If your idrive shows 45 psi recommended and the actual is 35, its like having them inflated to 25 psi vs. 35 when the tire is cold. Conversely, if you inflate to cold tire to the 45, it will go well into the 50's as you drive, and it will feel like the tires are solid rock in addition to accelerating tire wear.

I'm not certain I understand exactly what you're saying; (I don't own a G01, I own F25); my iDrive does not 'recommend' a tire pressure - it only displays the current tire pressure and related operating temperature data.

I have always measured/adjusted tire inflation pressure at 'cold' (ambient, temp; car not driven for few hours or more) condition; this is to my understanding basically industry standard for virtually all cars. The info on the door jamb and what is listed in the Owners Manual are both 'cold' inflation pressures - the Manual goes into more detail to cover different 'cold' pressure values depending on wheel/tire sizes and operating speeds.

So what is the method of checking/adjusting proper tire pressures on a G01? Sounds like it's different from simply 'inflate to X psi at 'cold' (ambient air temp) condition, but perhaps I misunderstand?
Thanks/Bill

[Sportstick]

Originally Posted by Wgosma

I'm not certain I understand exactly what you're saying; (I don't own a G01, I own F25); my iDrive does not 'recommend' a tire pressure - it only displays the current tire pressure and related operating temperature data.

I have always measured/adjusted tire inflation pressure at 'cold' (ambient, temp; car not driven for few hours or more) condition; this is to my understanding basically industry standard for virtually all cars. The info on the door jamb and what is listed in the Owners Manual are both 'cold' inflation pressures - the Manual goes into more detail to cover different 'cold' pressure values depending on wheel/tire sizes and operating speeds.

So what is the method of checking/adjusting proper tire pressures on a G01? Sounds like it's different from simply 'inflate to X psi at 'cold' (ambient air temp) condition, but perhaps I misunderstand?
Thanks/Bill

To clear up some of this:

• The door jamb label is for the GVWR, maximum capacity of passengers and cargo, an amount most folks don't carry every day, and therefore don't need this level of inflation to support the vehicle.
• iDrive reports actual pressures, not recommended. Check your owner's manual for recommendations, although some variation to preference is OK, as long as you meet the load requirements or for driving in excess of 100mph. tirerack.com has info under the tire specs for each model for load.
• Tire pressure should be done on a cold car before any driving. All recommended values presume a cold, undriven tire. This is true for all cars...nothing special about a BMW.
• Tire pressure will vary about 1 psi for each 10 degree F change in ambient temperature, so if your garage is heated to x degrees, allow for that in the winter for when you roll outside and the pressure will quickly drop.

[plainmaster]

Guys, I’m telling you, Conti DWS 20’s, none of the problems, all of the benefits.

I have no idea why people are going with 19” rims, or gasp! even 18” rims, on a performance vehicle like this, when 20’s work and look so good in the stock widths (245 front 275 rear).

[corn18]

Originally Posted by plainmaster

Guys, I’m telling you, Conti DWS 20’s, none of the problems, all of the benefits.

I have no idea why people are going with 19” rims, or gasp! even 18” rims, on a performance vehicle like this, when 20’s work and look so good in the stock widths (245 front 275 rear).

I got 19" rims for towing. Towing max weight with a low sidewall tire is not as good as a tall tire. But I agree that the 19" tire is not sharp on the turn ins and rolls more. That's why we have a Z4. It can't tow shite but man is it tight and flat in the corners.

[HighlandPete]

Originally Posted by Wgosma

I'm not certain I understand exactly what you're saying; (I don't own a G01, I own F25); my iDrive does not 'recommend' a tire pressure - it only displays the current tire pressure and related operating temperature data.

G01 has the "electronic tire pressures plate", in addition to any pressure sticker/plate on the door jamb.

As shown in the pic' (post#33) there is a 'recommended' running pressure shown, as well as the actual pressure.

Here's BMW's explanation...

Unlike the tire pressures plate sticker, the electronic tire pressures plate permanently monitors the nominal pressures taking into consideration the current temperatures. This means that it determines and displays the optimum tire pressure at any temperature.

I read that as saying the 'recommended pressure' is the optimum running pressure at that temperature.