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Tyre bead seating problems - SOLVED

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Taught2BCauti...
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PostPosted: 12:01 - 30 Jul 2015    Post subject: Tyre bead seating problems - SOLVED Reply with quote

Recently fitted a new rear tyre, and all was well until I hit a pothole that was impossible to avoid, and suddenly lost all the air.

Fortunately, this happened very close to my regular local Tyre Fitter's, and I was able to push the bike there for them to have a look.

They found no damage to tyre or rim, and they were able to re-seat the tyre with their air-line, but when I got back home, it went again as I turned into the drive.

I checked and cleaned the rim and tyre, and gave it a smear of Fairy Liquid, and it re-seated again - but it's still leaking from all around the rim, but on one side only.

I'm guessing I need something better than Fairy Liquid to do the job properly, but what?

Has anyone else had this problem, and if so, what did you use to fix it?
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Last edited by Taught2BCautious on 11:19 - 01 Aug 2015; edited 2 times in total
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stinkwheel
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PostPosted: 12:18 - 30 Jul 2015    Post subject: Reply with quote

Rather than a smear of fairy liquid, give it a good clagging of soap with an old paintbrush or a sluice round with watered down fairy liquid. Remove the valve core and bang the air into it as quick as you can until you hear the beads pop on. Then quickly screw the core back in.

Rinse off the excess soap with warm water to stop the rim spinning in the tyre.
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Taught2BCauti...
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PostPosted: 12:37 - 30 Jul 2015    Post subject: Reply with quote

No problem giving it an 80psi blast from my compressor with the valve core removed, but I have already tried Fairy Liquid and Swarfega, neat and diluted, but the tyre still goes down, in a sea of foam from the rim, in an hour or less.

I'm starting to think in terms of silicone sealant, roofing mastic, or something like that, but not sure what will fix it for good or make it worse.
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Mudshark
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PostPosted: 12:42 - 30 Jul 2015    Post subject: Reply with quote

this?

https://www.ebay.co.uk/itm/TYRE-RIM-BEAD-SEALER-BLACK-250-GRAMS-FOR-CARS-VANS-MOTORCYCLES/271185032934?_trksid=p2141725.c100338.m3726&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20141212152715%26meid%3D2ac9bb91710245059954fbe2ff9994ae%26pid%3D100338%26rk%3D2%26rkt%3D18%26mehot%3Dag%26sd%3D190892981058
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chris-red
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PostPosted: 12:48 - 30 Jul 2015    Post subject: Reply with quote

Tyres seem to be getting harder to seat. I used to be able to seat BT010's/Diablo Stradas almost instantly without removing the valve core and using my 25 litre compressor. The PR3's I have on the TDM now my mechanic REALLY struggled with his huge compressor and the valve core removed. With one he had to use a ratchet strap to squeeze the tyre closer to the bead.
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mentalboy
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PostPosted: 12:54 - 30 Jul 2015    Post subject: Reply with quote

stinkwheel wrote:
... Then quickly screw the core back in.


I'm curious as to the reason why you'd need to screw the valve core in quickly? The compressor blast is only to seat the tyre on the rim, not to inflate the tyre, so I can't see why speed of inserting valve core would make any difference. Confused

OP - firstly you need to remove that tyre and have a bloody good look at your rim. Ordinarily deflation problems such as yours (after rebedding a tyre) would be through corrosion on the rim - usually solved by cleaning up the corrosion - but this has happened after you've blown out a tyre on a pothole.
So, firstly, make sure there's no corrosion evident then check for signs of cracking and stressing on the rim. If any sign of corrosion be sure to make sure the tyre bead is also free from that delightful powdery stuff that ally alloy's produce.
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davebike
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PostPosted: 12:57 - 30 Jul 2015    Post subject: Reply with quote

Older wheel may need bead sealer common on Titian scooters and some Honda's particularly the Italian built ones
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Taught2BCauti...
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PostPosted: 13:32 - 30 Jul 2015    Post subject: Reply with quote

mentalboy wrote:
OP - firstly you need to remove that tyre and have a bloody good look at your rim. Ordinarily deflation problems such as yours (after rebedding a tyre) would be through corrosion on the rim - usually solved by cleaning up the corrosion - but this has happened after you've blown out a tyre on a pothole.
So, firstly, make sure there's no corrosion evident then check for signs of cracking and stressing on the rim. If any sign of corrosion be sure to make sure the tyre bead is also free from that delightful powdery stuff that ally alloy's produce.


The original hit on the pothole was fairly light and at low speed, probably no more than 10mph. I was already braking heavily from 30mph because a car coming towards me had veered onto my side of the road to overtake a parked car, and the driver decided that he needed to clear it by 12 feet!

There are no signs of damage or corrosion on the rim - the powder-coating is still intact.

Air is leaking from the joint between the rubber and the rim, not through the rim itself, so I'm guessing that the inner-most edge of the rubber, isn't sliding all the way onto the ledge (whatver it's called) on the inside of the rim.

Will try and add a pic or two later...
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stinkwheel
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PostPosted: 13:33 - 30 Jul 2015    Post subject: Reply with quote

mentalboy wrote:
stinkwheel wrote:
... Then quickly screw the core back in.


I'm curious as to the reason why you'd need to screw the valve core in quickly? The compressor blast is only to seat the tyre on the rim, not to inflate the tyre, so I can't see why speed of inserting valve core would make any difference. Confused


Because they can come back down off the seat again if you let all the air out. Especially if they are fairly new and flexible.

Also a possability it could be a bad tyre.
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I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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Taught2BCauti...
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PostPosted: 15:30 - 30 Jul 2015    Post subject: Reply with quote

Just tried again, the bubbles are very fine, and definitely coming from the joint between the tyre and the rim - all the way around apart from 2 x 5mm gaps.

[img]https://dl.dropboxusercontent.com/u/439700/BackTyre.jpg[/img]

Probably going to need an inner tube to fix this Sad
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MCN
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PostPosted: 17:41 - 30 Jul 2015    Post subject: Reply with quote

Taught2BCautious wrote:
Just tried again, the bubbles are very fine, and definitely coming from the joint between the tyre and the rim - all the way around apart from 2 x 5mm gaps.

[img]https://dl.dropboxusercontent.com/u/439700/BackTyre.jpg[/img]

Probably going to need an inner tube to fix this Sad


The rim is facked where the bead sits. Corrosion will do it. And no amount of fapphing will sort it.

Whip the tyre off and get into the rim 'Bead Seat' area with 600 Wet & Dry.
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kramdra
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PostPosted: 21:06 - 30 Jul 2015    Post subject: Reply with quote

Tire off, check bead and rim for damage. Clean up rim with a mild abrasive pad and... if it were not powder coated I would give a coat of paint.

A large tin of bead sealer is about 10 quid and would be a much better idea than tube.


chris-red wrote:
Tyres seem to be getting harder to seat. I used to be able to seat BT010's/Diablo Stradas almost instantly without removing the valve core and using my 25 litre compressor. The PR3's I have on the TDM now my mechanic REALLY struggled with his huge compressor and the valve core removed. With one he had to use a ratchet strap to squeeze the tyre closer to the bead.


Lies. I do my own tires using a 10 year old, leaking single barrel foot pump. I have never needed more than 50 PSI to pop both beads. 180/55/17 PR3's are easy Laughing
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evoboy
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PostPosted: 21:58 - 30 Jul 2015    Post subject: Reply with quote

What tyre is it?

It looks like a Mitas one from the font on the side?
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MCN
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PostPosted: 22:15 - 30 Jul 2015    Post subject: Reply with quote

A top tip for seating a bead:

1) Wrap a Ratchet Strap around the circumference (tread part) of the tyre.
2) Tighten the strap carefully as it can slip off if not aligned properly.
3) The compression of the tread will squeeze the bead out to the bead seat.
4) Once you have 360° contact blast a bit of air into it.
5) Release the strap before continuing the blow the tyre up.

This is how you get stubborn tyres to seat on the rims of Earth-movers.

More professional outfits use their truck mounted tyre handler pads to crush the tread and seat the bead. Same principle. Wink
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Taught2BCauti...
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PostPosted: 07:31 - 31 Jul 2015    Post subject: Reply with quote

The powder coating inside the rim is clean and shiny, like factory fresh, and it does seem to be getting better with each attempt, and there are now 5 small areas with no bubbles.

The tyre is a Mitas (well spotted) and I can't see or feel anything out of the ordinary around the edge, and there are no leaks at all on the opposite side.

I have tried most of the suggestions, so thanks for that - but I've given up now and dropped the wheel off at the local tyre fitter, and they have promised it back for tomorrow.
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Taught2BCauti...
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PostPosted: 11:27 - 01 Aug 2015    Post subject: Reply with quote

Just picked the tyre up, and it is sorted.

They removed the tyre and cleaned-up the bead with wet and dry, then re-seated it with a product called 'FirmaPress' (or PermaPress?).

Bloke said; "Sometimes you get a tyre that just won't seat properly, and it's the only thing that works."
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evoboy
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PostPosted: 22:23 - 03 Aug 2015    Post subject: Reply with quote

Taught2BCautious wrote:

The tyre is a Mitas (well spotted) and I can't see or feel anything out of the ordinary around the edge, and there are no leaks at all on the opposite side.


I asked because the offroad style tyres that they do are a right swine to get to seat on the rim. Normally needing 80psi or so, but they do eventually pop on. (Stand well back from it though!)

Least its sorted.
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Jim Mc
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PostPosted: 17:56 - 04 Aug 2015    Post subject: Reply with quote

I tried for ages once to seat the bead on a Continental tyre. It would not budge. I blasted it with an air compressor up to 90psi, I was using neat fairy liquid, ratchet straps around the outside but no joy, I was on for hours doing it.

In the end I took it to a local tyre factors, and the lad there had a bucket with a soap mix, just plain soap he reckons mixed into a runny solution, he lathered it up the sidewalls and put 40psi into it and it snapped home instantly. Took him about 2 minutes.
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MCN
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PostPosted: 19:41 - 04 Aug 2015    Post subject: Reply with quote

Jim Mc wrote:
I tried for ages once to seat the bead on a Continental tyre. It would not budge. I blasted it with an air compressor up to 90psi, I was using neat fairy liquid, ratchet straps around the outside but no joy, I was on for hours doing it.

In the end I took it to a local tyre factors, and the lad there had a bucket with a soap mix, just plain soap he reckons mixed into a runny solution, he lathered it up the sidewalls and put 40psi into it and it snapped home instantly. Took him about 2 minutes.


Quite obviously not enough Pixie Dust in the Fairy Liquid.
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