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PostPosted: Thu Feb 20, 2014 12:33 pm 
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Joined: Fri Apr 12, 2013 1:19 pm
Posts: 739
Location: South West England
So I pulled my carbons out the other day to look over them before my race on Saturday.
Obviously they were flat; however upon feeling the tyres, there is a hard patch in one -
about 6mm in length. I assume this is where the sealant has settled where I've been a bit
lazy with maintaining air pressure and turning the wheels? is there any way to fix this?

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Scott CR1 - 7.1kg - dead
BMC SLR02 - 7.6kg - dead

Kinesis Aithein - ~8kg


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PostPosted: Thu Feb 20, 2014 12:48 pm 
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Joined: Fri May 25, 2007 6:43 pm
Posts: 2628
If its a hard lump of sealant, more sealant *might* dissolve it. If its where the inside of the tube has stuck together, you are screwed.

Pump them up and give them a whizz, you might not even notice the lump when they are at 100+psi.


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PostPosted: Thu Feb 20, 2014 12:55 pm 
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Location: South West England
They pump up fine so I don't think it's the inside of the tube stuck together. Will give them a quick ride once the bike is clean and set up provided it's not raining....

_________________
Scott CR1 - 7.1kg - dead
BMC SLR02 - 7.6kg - dead

Kinesis Aithein - ~8kg


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PostPosted: Thu Feb 20, 2014 2:41 pm 
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Joined: Sat Dec 13, 2003 2:25 am
Posts: 4708
Location: Canada
That is one of the reasons I don't like sealant for tubulars. Really nothing you can do about it now, but I doubt it will make that much difference to your race. The other alternative would be to replace the tube, but that seems like overkill.


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PostPosted: Thu Feb 20, 2014 3:06 pm 
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Joined: Fri May 25, 2007 6:43 pm
Posts: 2628
Thinking about it, the lump is only a bit of congealed latex and "gunk", maybe trying to crush it against the rim bed or between fingers might allow it to break down a bit more easily.

And make sure its not a lump thats dried up and hardened round a thorn/piece of glass first!


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PostPosted: Thu Feb 20, 2014 4:56 pm 
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Joined: Fri Jan 07, 2011 6:58 am
Posts: 1161
Location: 604
I would imagine riding it will disintegrate the latex if it has hardened. You could also figure out what the solvent is in the liquid latex and put some more of that in to break it up?


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PostPosted: Fri Feb 21, 2014 12:49 am 
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Joined: Thu Mar 28, 2013 4:42 pm
Posts: 419
Location: Pa USA
The "solvent" in most sealants is glycol based-rv antifreeze is safe and works well-long thread on the mtbr board by some chemists about homebrew solvents. Not sure if you can dissolve a latex "booger" but worth a shot.


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