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PostPosted: Mon Jul 15, 2013 7:11 pm 
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Location: Mississippi
The Vredestins are natural latex which will lose more air than the pink or green latex that Vittoria or Michelin use. You just have to pump them up again and they should be fine :noidea:

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Posted: Mon Jul 15, 2013 7:11 pm 


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PostPosted: Mon Jul 15, 2013 8:05 pm 
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Yeah. The Vredestein's lose loads of air.

The biggest problem I had with them, though, is the valves - they keep failing and don't hold pressure.

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PostPosted: Tue Jul 16, 2013 7:46 am 
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Location: Estonia
Pumped to 8 BAR and after 12 hours 2,7 BAR (no riding, bike was hanging on the wall)
Loss is 0,44 BAR/hour

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PostPosted: Tue Jul 16, 2013 12:20 pm 
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Hi,

Quote:
The Vredestins are natural latex which will lose more air than the pink or green latex that Vittoria or Michelin use.


Are you saying that pigmented latex loses less air than natural latex?

Ciao, ;)

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PostPosted: Tue Jul 16, 2013 12:55 pm 
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I am just saying that in my experience the pigmented latex holds air better than the unpigmented (natural) latex.....just my personal experience. It could be down to many factors, maybe thickness? Or possibly the pigmentation bonds some of the gaps? I really haven't a clue.

However, the natural latex rides much better!

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PostPosted: Tue Jul 16, 2013 5:42 pm 
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I'd say:test mounted on wheel whith full pressure on water.you may have a small puncture really hard to find.

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PostPosted: Wed Jul 17, 2013 9:20 am 
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Hi,

Quote:
However, the natural latex rides much better!


Couldn't agree more. :thumbup:

Ciao, ;)

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PostPosted: Wed Jul 17, 2013 9:28 am 
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Location: Geneva, Switzerland
rainerhq wrote:
Pumped to 8 BAR and after 12 hours 2,7 BAR (no riding, bike was hanging on the wall)
Loss is 0,44 BAR/hour


This is not the porosity of latex, you must have a leak somewhere. This has happened to me once, and at first I didn't find the leak. But then I took my time, put the inflated tube in water, went slowly around, and found a tiny hole that emitted a micro-bubble every 3-4 seconds or so. Easy to miss.


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PostPosted: Thu Jul 18, 2013 8:05 pm 
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My Vreds always leak down like mad as well. More than my vittoria latex tubes in clincher or tubbies.


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PostPosted: Thu Jul 18, 2013 10:59 pm 
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Location: Belgium
Hi,

Quote:
My Vreds always leak down like mad as well


Any latex inner tube should, typically, not be leaking more than two bar in 24 hrs.
AFAIK all higher end tubulars use unpigmented latex inner tubes.

There's no such thing as a problem with Vredestein latex inner tubes. I can well imagine there's a lack of knowledge on how to mount latex inner tubes though.
Ciao ,:

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PostPosted: Thu Jul 18, 2013 11:35 pm 
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Easiest way to mount them is to get someone to sew them inside a nice tubular for you...

;-)

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PostPosted: Mon Jan 06, 2014 2:07 pm 
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Location: Surrey UK
About this time a year ago, regarding the new Vttoria's facilities we could red:
"The Nanographyte technology makes it possible for Vittoria to produce latex inner tubes that are 100% air-tight as well as lightweight. With 30 grams these inner tubes are the lightest in the world."
Any light on these new tubes would be welcomed. Have they reached the shopping shelves yet?

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PostPosted: Mon Jan 06, 2014 3:33 pm 
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"Vittoria aim to introduce some key products with the new Nanographyte material in mid-2014 for the 2015 season."

6 months from now at the earliest.


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PostPosted: Mon Jan 06, 2014 7:21 pm 
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Joined: Sat Sep 22, 2012 2:22 pm
Posts: 218
fdegrove wrote:
Hi,

Quote:
Vulcanizing patches like Rema Tip Top work just as well for latex tubes as for butyl.


It works but then you find yourself with Half a Nelson.

Anyone use their brain any more?

Goodbye and good night, ;)


Just been reading this thread though, I don't understand the above comment. What's 'Half a Nelson'?

I've got a Rema patch on my Michelin latex tube and have been using it for approx 6 months with zero issues.


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PostPosted: Mon Jan 06, 2014 8:13 pm 
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Hi,

If by "work" one means it actually sticks to the latex inner tube, then yes, it does.
But then what's the point of using latex inner tubes if one's going to patch them with something that has nowhere near it's superior elastic properties?

Half Nelson refers to a movie that goes by that title but never mind....

Ciao, ;)

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Posted: Mon Jan 06, 2014 8:13 pm 


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