[kenslicktop]

Hi there,
I'm a long time bmw owner, but never a SUV.
Currently an E61 wagon & e90 M3. Replacing the wagon with the X3.

I've been trying to find a CPO X3 with the premium & parking asst pgk's.
Very hard, with the colors I'm looking for. White on black.

Now I'm looking into a new one, yikes. And I've only got about 2 months
before they stop building the 24's.

Haven't had a car with RFT before.
How many miles do they typically last on these heavy vehicles?

Does anybody put "regular" tires on instead? If so, do you carry an inflation device ?

Are you all happy with the RFT's ?

I've noticed that whenever I turn on the air controls, the AC is automatically defaulted on. Is there a way to turn that off, so I can turn it when I want to,
not all the time.

Thanks for the help

[Plimmie]

I have an X3 M40i with adaptive M suspension and 19” RFT.
It is a comfortable ride here in the Bay Area.

[bouchy]

Now I'm looking into a new one, yikes. And I've only got about 2 months
before they stop building the 24's.

Haven't had a car with RFT before.
How many miles do they typically last on these heavy vehicles?

Does anybody put "regular" tires on instead? If so, do you carry an inflation device ?

Are you all happy with the RFT's ?

I've noticed that whenever I turn on the air controls, the AC is automatically defaulted on. Is there a way to turn that off, so I can turn it when I want to,
not all the time.

People complain that all slots for M40i G01 are taken/blocked. Consult with your dealership.

There will be some people stating their tyres lasted >50k km, on the other hand for some people it's only 25. Driving style, roads, load (weight) are very different. I presume you don't change to winter tyres. Rotate regularly, the xDrive doesn't like more than 2mm of tread depth difference.

Yes, some people do. Non-RFT are somewhat cheaper, they say softer and they say tyres last longer (I didn't get the reason why). Be careful, with RFT you won't get a spare wheel (and tool kit!). No, side cut cannot be repaired with any kind of spray. Yes, "inflation device" (i.e. 12V compressor) is provided. Lastly, some rim options are available with RFT, some only with non-RFT. Rims are critical, since a new set costs like $4500.

Although I have no direct experience with non-RFT, I am happy. The wizardry can be solved by inflating tyres to less than recommended (which is about 3 bar). Ridiculous tyre pressures are because of (at least EU) homologation rules. They can't homologate with "eco" and then recommend 0.5 bar less.

Is it possible to keep the ventilation always on? I use off position sometimes, tbh I didn't notice if A/C LED is on when back to ventilation. I use A/C all year long (well, the LED indicator says nothing about whether the compressor is engaged or not, because "savvy" people turned A/C on only twice a year which seized the compressor). Next, "modern cars" are not designed to work without ventilation + A/C on (from my XP). Idk why but the windshield get misted very quickly, even at mild warm days, not only during rain/cold.

[Jolbex]

Never seen 3bar pressure, my 40i (Germany) has 2.2 front and rear! It is clearly visible on B pillar sticker. iDrive does indeed recommend 2.5/2.7 but i trust the sticker.

[JonasM40i]

Originally Posted by Jolbex

Never seen 3bar pressure, my 40i (Germany) has 2.2 front and rear! It is clearly visible on B pillar sticker. iDrive does indeed recommend 2.5/2.7 but i trust the sticker.

Same here (Austria).

I run Continental Sport Contact 6 (non RFT) with a pressure of 2.2 bar front and rear.

When I look at the tires, I think they will last about 25k in my case. I don't drive them until they no longer have any profile, but rather change them when they are just below the mark, so there is no danger of aquaplanning.

[spangle1980]

Mine have just been replaced at 17k miles. The rears, which I thought were close, were actually 1.0mm (isn't it funny how in the UK we use both metric and imperial :-|) when the limit is 1.6mm in UK. That was a shock (I had been checking but clearly in the wrong place). The fronts were on about 3mm but they replaced them also due to outer edge excessive wear.

These were the stock M40 RF Alenza 21" (it's a lease car so the bar-stewards replace with like :-/).

I am not a sedate driver.

[bouchy]

Originally Posted by Jolbex

Never seen 3bar pressure, my 40i (Germany) has 2.2 front and rear! It is clearly visible on B pillar sticker. iDrive does indeed recommend 2.5/2.7 but i trust the sticker.

My x30d at 245/50/19 sometimes says 3.2 bar I have to take a pic. I trust iDrive, because it reflects ambient temp, speed etc. And I can see how the actual tyre pressure follows what's recommended. Stickers were good, but guess what... people said "maybe I should check my tyre pressure, I will do it on the way home". Boom. Tyres are like +20°C in temperature, but the manual clearly says "check the tyre pressure before drive". Not sure how others, but I have to travel some km to the nearest petrol station (with a compressor). The most I can do, my car shall serve me, not otherwise. Since I do it once in a while, I can see how much different the tyre pressure can be, solely because of the weather, sunshine,..
There are people who damaged their tread and when you forced them to check (inacuratelly at the petrol station) their pressure, that was like 1.0 bar...

[Jolbex]

No, im saying the idrive suggests 2.5/2.7 on COLD tyres.

[IAmSpeed]

Stock RFT seems to last ~20k miles on average.

[Sportstick]

Anecdotal information here and some consumer reviews on Tire Rack seem to support that the 19" Bridgestone Dueler RFT are more comfortable than the 20" Bridgestone Alenza RFT. This may be a combination of tire sidewall height as well as the design of the two tires. I find our 19" Duelers surprisingly comfortable even while providing good responsive steering and handling.

[Leem40i]

Get rid of the run flats. I dumped those things within a week of getting mine. I couldn't stand the weighted vague steering and harsh ride. No matter what improvements they make the RFT will always have a harsher ride because thats how they work. They have to have a stiff enough sidewall to keep the wheel rolling even with no air.
I went with Michelin PS4 AS that should last 40+ K miles. Buy yourself a green slime inflator kits built for SUV's and trucks and keep it in your trunk.

[EWL5]

Originally Posted by Sportstick

Anecdotal information here and some consumer reviews on Tire Rack seem to support that the 19" Bridgestone Dueler RFT are more comfortable than the 20" Bridgestone Alenza RFT. This may be a combination of tire sidewall height as well as the design of the two tires. I find our 19" Duelers surprisingly comfortable even while providing good responsive steering and handling.

I will add to that anecdotal evidence by saying my 19" Bridgestone Dueler RFTs have performed admirably and the only knock being slightly more road noise (not having acoustic glass in the US also makes this worse!).

An OEM spare can be ordered on a custom order but it does raise the floor of the trunk by a bit but don't know by how much.

[Spacecoast]

An OEM spare can be ordered on a custom order but it does raise the floor of the trunk by a bit but don't know by how much.[/QUOTE]

~3-4 inches. A small price to pay to have the insurance of a spare tire in case of a flat.

[Sportstick]

Originally Posted by Spacecoast

An OEM spare can be ordered on a custom order but it does raise the floor of the trunk by a bit but don't know by how much.

~3-4 inches. A small price to pay to have the insurance of a spare tire in case of a flat.[/QUOTE]

Indeed, I have the spare tire option and all this luggage fit...with the rear seats up.

[14Down]

Our prior '20 X3 M40i had the 19" Bridgestone Alenza RFT summer tires. They were good for about 15k miles max. I replaced them with Alenza non RFT summer tires that were on sale at Tire Rack. Ride comfort improved noticeably. I carry a small compressor and a tire repair kit, along with a small jack in case I need to lift the tire to get to the puncture (never had to use it but have used it on prior cars). Won't help with sidewall damage. My son has the car now. We replaced it with a '24 X3 M40i and ordered the compact spare tire with the raised floor (still carry a compressor and plug kit just in case). Reduction in luggage space is acceptable.

[Sportstick]

Originally Posted by 14Down

Our prior '20 X3 M40i had the 19" Bridgestone Alenza RFT summer tires. They were good for about 15k miles max. I replaced them with Alenza non RFT summer tires that were on sale at Tire Rack. Ride comfort improved noticeably.

Interesting. Check out this comparison from Tire Rack...same 19" size, both Bridgestone, both RFT, one Dueler and one Alenza. Look at the difference in the scores, especially for comfort and treadware! The Alenzas do nothing as well or better, are more expensive, and far less often recommended, questioning why they even exist?

[EWL5]

Originally Posted by Sportstick

Interesting. Check out this comparison from Tire Rack...same 19" size, both Bridgestone, both RFT, one Dueler and one Alenza. Look at the difference in the scores, especially for comfort and treadware! The Alenzas do nothing as well or better, are more expensive, and far less often recommended, questioning why they even exist?

Looks like the Alenzas have the higher 105W speed rating (up to 168 mph). Aren't most car velocities (including the M40i) electronically limited anyway?

[Sportstick]

Originally Posted by EWL5

Looks like the Alenzas have the higher 105W speed rating (up to 168 mph). Aren't most car velocities (including the M40i) electronically limited anyway?

Possibly, I don't know, but is an H rating of 130mph (206 kph) a factor for anyone in the U.S. or most in Europe?

[ContactPatch]

The millage/performance you get from the Alenza 001 RFT makes the tire too expensive, one set (factory tire) and done with this tire.

[bouchy]

...by inflating tyres to less than recommended (which is about 3 bar). Ridiculous tyre pressures are because of (at least EU) homologation rules. They can't homologate with "eco" and then recommend 0.5 bar less.

For cold tyres I see this:

Recommendation: front: 2.8 bar; rear: 2.9 bar. Ambient temp. 10°C



After a ride:

Is it possible to keep the ventilation always on? I use off position sometimes, tbh I didn't notice if A/C LED is on when back to ventilation. ...

No, it isn't (preLCI 2021 G01):
1. Switch A/C off
2. Keep pressing "-" until the ventilation is shutdown
3. Press "+" to switch it on
4. A/C LED indicator remains in off state.

https://youtube.com/shorts/CSl22cP40bo?feature=share

[14Down]

I wouldn't have bought the Alenzas again but for the fact that they were on clearance for the price of two tires. BMW raises the speed limiter in the M40i to 155 mph only with the summer tires that are rated for such speeds (the Alenzas when I ordered the car).

[autoart]

You can say "hay bmw shut off the a/c"