G11 Non Run Flats thread - Real experiences please

[Stormbitch]

I am hoping to hear from anyone who has air suspension and has changed out their run-flats.

There's lots of real help here but I'd like to hear from someone who has more balls than I and have done so with or without issues on their G11 / G12.

Not wishing to over post on a. the same issue b. a tired issue - I am sure the forum will love the extra serps push

AS BMW offers non run-flats on their site to car builds WITH air such as X5 and the 7 ( although not at this precise moment n the 7 ) surely it makes no sense that non run-flats will ruin the diff or the suspension. Do they for instance code the air suspension differently if you specify non run flats from factory?

[NewQ]

I've had two G12 7s, and on both I swapped out the runflats the same day I got the car.

Never had an issue.

BMW wouldn't make a car that breaks when a user puts on something as variable as tires.

The non-runflats didn't make as much of a difference as I thought they would, but they do help.

[13M5F10]

Originally Posted by Stormbitch

I am hoping to hear from anyone who has air suspension and has changed out their run-flats.

There's lots of real help here but I'd like to hear from someone who has more balls than I and have done so with or without issues on their G11 / G12.

Not wishing to over post on a. the same issue b. a tired issue - I am sure the forum will love the extra serps push

AS BMW offers non run-flats on their site to car builds WITH air such as X5 and the 7 ( although not at this precise moment n the 7 ) surely it makes no sense that non run-flats will ruin the diff or the suspension. Do they for instance code the air suspension differently if you specify non run flats from factory?

RFs and Non RFs don't impact the suspension. In fact, the Non RFs have a better quality drive than non RFs because they are a softer compound, have less road noise, and handle better.

I posted this in another thread with the same question.

I hate the run flats due to the road noise and harsher ride. I switched over Michelin's PS4S and it's night and day difference.

I carry the following items in my trunk
- BMW Mobility Kit (Tire Inflator & Slime) - fits perfectly in the first aid compartment. I use this as a last resort as its messy on the inner tire and wheel.

- Boulder Tire Repair Kit - this kit is heavy duty compared to the shit you get at autozone which I do not recommend. If I get a nail and the tire will not keep air, I use this kit to plug the tire and allows me to get to a tire shop or BMW. It's saved me so many time's. Used it in all my cars that had no spares. Easy to do but will have to get your hands dirty. It takes me 10 minutes tops to do the plug and then inflate.

https://www.amazon.com/Boulder-Tools.../dp/B01E635PGA

[Stormbitch]

Amazing, this is so helpful.

And quite inspiring. I too have had 2 G11s - they can't be that bad eh

I do wonder about the difference - yes but theres so much evidence even now - maybe yours were loud non run flats?

I will check out your other thread you linked it right?

[13M5F10]

Originally Posted by Stormbitch

Amazing, this is so helpful.

And quite inspiring. I too have had 2 G11s - they can't be that bad eh

I do wonder about the difference - yes but theres so much evidence even now - maybe yours were loud non run flats?

I will check out your other thread you linked it right?

Run flats are just known to be louder and harder rides due to the harder compound and structure of the tires. There are newer tech RFs that ride better I've read. Being tuned, traction is important to me so going to non-RFs is my better option too.

https://www.google.com/search?q=run+...e-gws-wiz-serp

[krautmeister]

I think it also depends on where you are. I know some members are driving from California and taking long stints in remote highways across the desert.

I'm an east coast guy so my driving will always have close proximity to rescue infrastructure.

RF is only good for small punctures as if you get a serious flat like a pinch flat (3x in my life in Atlanta, each different cars), it's irrelevant whether it's RF or NRF. These cars don't have spares so you're waiting for roadside regardless.

I run NRF bc of the quality of the ride / traction / noise. It was my first "mod" on my G12.

The PZero looks like this with a pinch flat.... ain't going anywhere!

[Stormbitch]

Looking at the db readings on the various websites of both non and rf tyres it seems that the db reading is the same on both...

Wondering if there is an issue with the DB readings or the quietness is a myth.

Just had an S8 on non run-flat with 20s and its whisper quiet... but then there are other sound things going on with the Audi.

[AlteBMW]

I had RFT on a '17 G12, and have them on my current '20 G12. Also on a '19 G01. RFT on the '20 and '19 are way better than they were on the '17. Technology keeps improving. Of course non RFT tehnology advances too, and non RFT will IMHO always have a ride quality advantage. I haven't swapped them out because with my bad back, changing tires is no longer feasible. I also do not want to lose the storage space with a spare. I do carry a BMW mobility kit in the G12 and similar Slime package in others just in case. At least BMW gives the option when ordering. For my wife's MB E Wagon, it was RFT only.

[Googsy]

My used G11 came with runflats that are practically new (Bridgestone) I’m dying for them to wear out so I can replace with Michelin Pilot Sport 4S tyres. If they were older I would have no hesitation.

[Stormbitch]

Originally Posted by Googsy

My used G11 came with runflats that are practically new (Bridgestone) I’m dying for them to wear out so I can replace with Michelin Pilot Sport 4S tyres. If they were older I would have no hesitation.

Why is that mate?

[Googsy]

My friend has a G11 that has the Michelin non runflats , the ride is much better in terms of smoothness and coping with bumps etc . Quieter too. He has the same model and year as mine so fair comparison in my opinion.

[13M5F10]

Originally Posted by Googsy

My friend has a G11 that has the Michelin non runflats , the ride is much better in terms of smoothness and coping with bumps etc . Quieter too. He has the same model and year as mine so fair comparison in my opinion.

I switched from the Pirelli RFTs to Michelin PS4S and I agree. The ride is quieter, handles better, and a more enjoyable drive.

[Al Pinã]

I too switched from the Pirelli Cinturato RF to a non RF Cinturato and the car immediately felt more nimble and a bit more compliant over rough pavement.

[Scrh1]

I run the hankook v12’s on the 21 inch type 629’s. Handling is fantastic as well as the look. Had the pirelli run flats as my first set and enjoy the hankooks much more. Like others I keep a good portable floor jack, plug kit , and mobility kit +inflator.

[kmk786]

Got down to 5/32 on the Pirelli P-Zero RF with 12K on 2020 750. Purchased and installed a set of Continental Extreme Contact DWS Plus. Night and day difference in road noise and grip. I am in a lease, so plan on storing the RFs until turn-in. To those with RF installed, make the move. You will be glad you did.

[Melbourne_X5M]

Those who switched to non-RF tires, what psi are you running? Surely not the 46 psi needed in the original RF’s.

Thanks

[kmk786]

Originally Posted by Melbourne_X5M

Those who switched to non-RF tires, what psi are you running? Surely not the 46 psi needed in the original RF’s.

Thanks

Your question (very logical) led me on a quest to this post. The responses seem to make sense. I am going to stick with the numbers recommended on the door myself 43 front/45 rear PSI.

https://www.reddit.com/r/cars/commen...for_run_flats/

[Melbourne_X5M]

Originally Posted by kmk786

Your question (very logical) led me on a quest to this post. The responses seem to make sense. I am going to stick with the numbers recommended on the door myself 43 front/45 rear PSI.

https://www.reddit.com/r/cars/commen...for_run_flats/

Very interesting.

When I switched my 2016 S550 4Matic to NRF tires, the psi required was 32 front and 33 rear.

As that car and this 2018 750xi weigh about the same, I am perplexed.

[Melbourne_X5M]

I actually just did the math and fully loaded 37 front and 37 rear.

Further, in the OM, the only version of 7 series that specs STD tires is the 760Li Xdrive: it requires psi of 39 both front and rear.

37 psi all around makes sense as the 760 weighs 505 lbs more curb weight.

It is normally just me and possibly my wife, so I will be running 37 psi all around, even though I could run 33 in the rear without a load.

[ANTWAN229]

Originally Posted by Stormbitch

I am hoping to hear from anyone who has air suspension and has changed out their run-flats.

There's lots of real help here but I'd like to hear from someone who has more balls than I and have done so with or without issues on their G11 / G12.

Not wishing to over post on a. the same issue b. a tired issue - I am sure the forum will love the extra serps push

AS BMW offers non run-flats on their site to car builds WITH air such as X5 and the 7 ( although not at this precise moment n the 7 ) surely it makes no sense that non run-flats will ruin the diff or the suspension. Do they for instance code the air suspension differently if you specify non run flats from factory?

I have a G12 M760xi. There's a difference in how that car feels when driving runflats vs non-runflats. On the info-system you can set the system for none RF and the suspension will seem a little less comfortable (Michelin all season ties 40psi - what I have). I prefer RF with the system settings to the factory tires (47psi) and have let the system know that I drive +100 mph. This setting softens the suspension for the added tire pressure. I've tried this setting with the Michelins, the tire diameter is slightly different and the car knows it, so I have to change the computer settings for all-season tires and I don't like the ride quality.

For the RF, I start with 42psi and when warm they are at 46psi, the idrive system will recommend 47psi when you set it to drive above 100mph.

[Stormbitch]

Not sure I know where that is in the system !?!

I have also seen some budget non run-flats "Rotalas" 69 dB so same as the Pirelli and half the price...

I thought why not try a cheaper tyre if I am going to experiment right? If it was a bad move then I have wasted a lot less money ...

Rotallas are £80 and £100 a side
Pirellis are £245 each

[skullz]

Originally Posted by 13M5F10

I switched from the Pirelli RFTs to Michelin PS4S and I agree. The ride is quieter, handles better, and a more enjoyable drive.

I've thousand comments of people said that how happy they are when change from RTF to NonRFT Michelin PS4S and actually I'm consider, too.
But one thing that no one mention is change Tire and/or from 20 inch wheel to the same size, or lower it to 19inch?

I'm not sure which makes the most effect to ride smooth and quietness, change NonRFT or lower wheel size to 19 inch.

Appreciate for everyone's experiences.