tubeless tyre valve stem

Rob.

Can you point us to the bit the supports or refutes your question or do we all have to buy the manual you reference?

Cheers

Anthony

Anthony I have an older version of the manual and as there has been a lot of changes since the introduction of run flats I was hoping someone, a vendor probably, would have a more up to date copy.

I will send the links to my tyre engineer and see what he thinks

Rob

You have a tyre engineer?

Tony yes two actually. Comes from working in and around the fleet industry for a very long time and doing a great deal of tyre durability testing. Learnt a great deal about round black sticky things over the last 40 years or so

Rob

Tyre engineers are always available to those people using large numbers of heavy duty tyres.

When I owned 19 x 50 tonne Komatsu dump trucks in the early 1990's, and chewed through a large number of big tyres, the tyre companies would always make a tyre engineer available to me, to "run the numbers" on a job, or investigate the reasons behind tyre failures.

Cheers, Ron.

They work really well, I've carried the tool and spare stems for years, used it several times, only once each for my vehicle and trailer but as many again for others.

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I must lead a 'Charmed Life'.

Never, in all my travels, have I needed to change a valve stem.
Maybe I change the vehicle frequently enough? lol

p.s. I do carry a couple of spares and if needed would slip the tyre off the bead.

You still really need a tool to pull it through.

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I presume you are addressing me Shaker? If so....

I already have a suitable device to pull a valve stem through the rim.......
My 'deflator tool' will screw onto the stem after passing it through the rim and would afford a good grip to pull a lubricated stem into position.

Now ask about cracking the bead off the rim!

I think it really depends firstly on where you are driving, off track and in rough country there is a greater chance of busting them off and also some wheels expose the stems to possible damage more than others.
My breakages were years ago when it was possible to drive on overgrown or non existent tracks in wooded country where fallen timber can break them off.
Doesn't happen much these days as there are so many weekend warriors driving on a decreasing amount of available tracks.
I've only every broken one in desert country on one of those desert grevillieas.

Allan - For bead-breaking, you carry a metre-long piece of hardwood (a thick 4" x 2" is good - that is, a 4" x 2" sawn oversize on the 2" side).
Picking a piece of good solid hardwood with no flaws, and straight in the grain, is important.

You set your tyre down on some hard ground, valve up, and place the piece of wood at right angles to the rim, and hard up against the rim, near the valve.

You then drive your front wheel carefully up the piece of wood until the front tyre's full weight, is on the flat tyre.
You can use a rubber hammer to assist in the bead-breaking, if the bead is reluctant to move much.

Drive back off the tyre, rotate the rim a few degrees and repeat the process. If necessary, do this several times.
If the bead is still recalcitrant, squirt some detergent around the bead, and keep attacking it by driving up the length of wood.

I've rarely failed to break a bead on vehicle tyres, using this method. Getting good support under the rim is important - if in soft ground, you need to put something solid under the rim to support it.

Cheers, Ron.

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Ah Ron, that "Now ask about cracking the bead" was really a 'Dorothy-Dixer' aimed at Shaker.

I tried your technique on the second front-wheel puncture for the day. Jacked-up the vehicle and removed the wheel, placed it with a plank as described, put the Troopy in 1st and slowly let the clutch out, thump...... it fell off the jack!!!!!

No, seriously, I have a simple and highly effective bead-breaker. It is the gadget shown in my first photo. It attaches to my jack as per the second photo.

The wheel is placed flat on the ground under the towbar with the curved blade positioned on the bead. The rest should be obvious.... several 'bites' and the bead is free.
Yay.... Smallest, simplest bead-breaker on the planet. Fashioned on the tyre-shop machines.

And, for reseating the bead, I have another simple device that does not entail air pressure tanks or hydrocarbon explosions. But that can wait for another time.