[chris-c]

Just seen someone selling a compressor and gunk from a F30 with runflats. My F31 has runflats and I'm sure it doesnt have a compressor in the boot unless its hiding really well.

Any ideas?

[Rbrown]

Sadly, no compressor or gunk as standard. You will need to buy some or just run the run flats if you get a puncture.

[chris-c]

Suppose I better buy a pump for the 340. I have one for the Volvo but it'd be just my luck to be somewhere with a slow puncture and not realise

[bimmer456]

If you have runflats there is no compressor included. The tpms will let you know if you have low tire pressure and you have approx 50 mike range with no air pressure. Not sure if you can use the gunk and compressor with runflats as they are not supposed to be repaired and may be unsafe to drive that way. That being said I just saw the jay Leno garage episode where this guy has the original knight rider trans am from the 80s with the original 35+ year old tires still on it. I would recommend driving slowly on those lol.

[SkyJawa]

Don’t get the expensive bm one just get a “Slime” kit from Amazon or anywhere cheapest

[dangerous_al]

I believe the compressor and gunk is supplied if you specify none run flats. The point of run flats is you don't need to do anything if you get a puncture as you can still drive on it, drive to a tyre place a get a new tyre.

[chris-c]

Originally Posted by dangerous_al

I believe the compressor and gunk is supplied if you specify none run flats. The point of run flats is you don't need to do anything if you get a puncture as you can still drive on it, drive to a tyre place a get a new tyre.

I thought you did damage to the tyre if you drove it too far with no air.
If I had a slow puncture that left the car with naff all air I'd imagine it'd do more damage driving it rather than pumping it up and driving it.

I've had nail holes in tyres before and slow punctures are annoying but being able to pump it back up got me out of a jam.

[Chas325]

Originally Posted by chris-c

I thought you did damage to the tyre if you drove it too far with no air.
If I had a slow puncture that left the car with naff all air I'd imagine it'd do more damage driving it rather than pumping it up and driving it.

I've had nail holes in tyres before and slow punctures are annoying but being able to pump it back up got me out of a jam.

You can’t drive a regular tyre anywhere with no air - you’d ruin your wheel rim. Hence, with no run flats you need the compressor and gunk. With the run flat you don’t need it as they are designed to run with no air in for 50 miles ish. It will wreck the tyre, however, they are not to be repaired anyway so doesn’t matter

[chris-c]

Seems there are many places that will fix a puncture in a run flat. Goodyear even say it is fine as long as its in certain places and the tyre hasn't been driven fast/far at low pressure.

[dangerous_al]

Originally Posted by chris-c

I thought you did damage to the tyre if you drove it too far with no air.
If I had a slow puncture that left the car with naff all air I'd imagine it'd do more damage driving it rather than pumping it up and driving it.

I've had nail holes in tyres before and slow punctures are annoying but being able to pump it back up got me out of a jam.

If you drive on a run flat with no air, then yes that will wreck it and you will need a new tyre. If you catch it and reinflate and take it immediately to a tyre repair place then you can get them repaired, I have had a few done without any issue, but it depends on where the puncture is and whether the carcass has been damaged by running too long without air.

[chris-c]

Originally Posted by dangerous_al

If you drive on a run flat with no air, then yes that will wreck it and you will need a new tyre. If you catch it and reinflate and take it immediately to a tyre repair place then you can get them repaired, I have had a few done without any issue, but it depends on where the puncture is and whether the carcass has been damaged by running too long without air.

So for the sake of £10 for a cheap compressor to keep in the boot it makes sense.

[ac16161]

Having just picked up a nail in a front tyre this weekend I appreciated the alert from the TPMS and the ability to continue on my runflats. But this thread has made me think that carrying a compressor would be wise. Does anyone have a particular recommendation? I was looking at something like this:

https://www.amazon.co.uk/RX-i-Digita...mpressor&psc=1

[chris-c]

I've got an old one of these in the Volvo and I highly recommend it:

https://www.amazon.co.uk/Ring-RAC630...yre+compressor

and I'm swaying between being cheap, paying £11 for the Analogue one that will pump from flat in 4.5mins to getting the newer version which is even further upgraded for £32.

I like shiny things so will probably go for that.

I'll check if it fits in its pouch in the side panel in the boot as it'd be nice to keep it out of the way if it can.

Fast pumps make the chore of pumping up / checking pressures so much easier to deal with.

[tjlees]

I went for http://https://www.amazon.co.uk/gp/product/B002Q560WE/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Which pumps up the tyre quickly.

You *can* repair some of the rft as recommended by the manufacturer (rather than the stealer not recommending any repairs) - the compressor, tmps and repair saved me £200 replacement tyre.

Here is the stuff from the main tyre manufacturers:

Repairing Bridgestone run flat tyres

Advice from Bridgestone states that with certain types of punctures in the tread area the Bridgestone Run Flat Technology (RFT) tyres may be repaired, subject to certain conditions. These conditions include what speed the tyres were driven on after the puncture.

Repairing Continental run flat tyres

Advice from Continental states that their Self Supporting Runflat (SSR) run flat tyres should not be repaired or reused after they have been damaged or run on flat.

Repairing Dunlop run flat tyres

Advice from Dunlop states that their Dunlop Self Supporting Technology (DSST) run flat tyres are repairable provided that the puncture is within the repairable area as defined by British Standard BS AU 159.

Repairing Goodyear run flat tyres

Advice from Goodyear states that if a puncture occurs on one of their Extended Mobility Technology (EMT) run flat tyres, it can be repaired provided that the puncture is within the repairable area as defined by British Standard BS AU 159.

Repairing Michelin run flat tyres

Michelin state that their Zero Pressure (ZP) run flat tyres can be repaired once but the puncture repair must be completed in line with British Standard BS AU 159.

Repairing Pirelli run flat tyres

Official advice from Pirelli states that all run flat tyres should be changed and not repaired after a loss of pressure. Damaged Pirelli run flat tyres or those that have experienced a loss of pressure, should be replaced immediately.

[ac16161]

Thanks for the compressor recommendations. Guess it's a toss between the Ring RAC630 and the RAC635. They seem to be about the same price and spec.

[soulboy]

you cannot specify non run flats all bmw come with runflats you have no choice

[onstat]

Originally Posted by soulboy

you cannot specify non run flats all bmw come with runflats you have no choice

18" optional black wheels on the 3 series used to come with non runflats.

[aquazi]

Originally Posted by soulboy

you cannot specify non run flats all bmw come with runflats you have no choice

All BMW’s except M cars!

Also you used to be able specify the Alpina’s with/ without them back in the day... not sure whats the deal on the new ones.

[chris-c]

mine fits nicely in the pocket with the high visibility jacket

[sensible]

I bought one if these. I paid about £20, to use with my winter tyres that aren't run flats.
https://www.ebay.co.uk/i/25346946636...D1487998796312

I will be putting my summer wheels and tyres on this week that are run flats, but will leave the kit in the car.

A little while ago I got in my car one morning and got a low pressure warning showing 18psi. I hadn't had any warning the evening before. There was a nail in the centre of the tread. I pumped it up with my compressor and drove it to the garage where it lost 1psi during the journey. I knew it had not been driven in a deflated state and got it repaired.

.....so maybe a good idea to carry a compressor but not sure if it would be worth using the sealant on a run flat. (would the sealant damage the TPMS valve as well as the run flat tyre ?)

[nik patel]

I am thinking of changing my run flats to non, i take it there will be no issues with the tyre pressure monitoring system?

[Rbrown]

Originally Posted by nik patel

I am thinking of changing my run flats to non, i take it there will be no issues with the tyre pressure monitoring system?

No. All ok.