Hi,



I don't think those are butyl. Probably butylized latex a la AIR-B (which Michelin bought and subsequently kept in the fridge...).

Ciao, )

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Being a snob is an expensive hobby.

Meneer,
Yes these look like indentations and there are repetitive circular ones too along the center. But would such indentations become permanent in the tube? The tube was used very briefly.
The popping I'm referring to is small bubbles forming in the tube (as in bubble-gum) then going "pop", hole in the tube. Happened twice already on this tube.
I noticed another bubble forming when I tried to inflate the tube outside of its envelope (tyre). What are your and other peoples' experiences with this? I was saving my latex tubes for a better day and ended not using them for years.

Hi,

Meneer De Hond,

Given time and pressure yes, these marks would become permanent with latex inner tubes such as Michelins.
This would not happen with a more old fashioned unpigmented latex inner tube but it's not something I would lose sleep over.
I don't use those coloured ones anyway as I find the unpigmented ones to be more comfy and lighter too.



Get yourself some bubble gum instead.....
Seriously though, you should never, NEVER, inflate latex inner tubes outside their envelope. They can't be manufactured with even wall thickness throughout the product and even though the material can stretch to up to 9x its uniflated state the unevenness will make certain spots look like a frog's cheeks whilst kokakking....
Untill it goes kaboum.

Ciao,

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Being a snob is an expensive hobby.

Thank you for this post.

what is that supposed to mean? Latex with a butyl coating?

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Apparently my bikes were talking the other day & are undecided whether to upgrade the current rider or get a new one...

one of the schemers...

Hi,

That's what it boils down to, yes. Nothing new really, the process was invented by A. Boule (AIR-B) to render latex inner tubes more airtight and still keep much of latex's advantages.

Similar processes are used in tubeless tyres, tubeless tubular tyres etc.

Going by looks alone the Panarcer look as if the butyl is on the outer side of the inner tube whereas the AIR-B inner tubes use the technique the other way round.

Ciao,

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Being a snob is an expensive hobby.

My new 60mm Vredestein latex tubes are barely long enough to poke out of my Reynolds 46mm rims. My pump head can barely register enough grip; ends up slowly migrating off the valve core when pumping. The Vredesteins are a real pain the rear. Argh!

Challenge latex, 60mm - measures 60mm from the base of the valve to just below the valve core.
Vredestein latex, 60mm - measures 60mm from end to end, making it effectively ~5-10mm shorter than the Challenge 60mm tube.

So, who makes the lightest valve extenders OR where can I get more 60mm Challenge latex tubes?!

viewtopic.php?f=3&t=62246&hilit=lightest+valve+extenders

_________________
My sub-5.7kg / 12.53lb Addict R1

WTB: Challenge latex tubes, 700c x 60mm - NEW only

Got my first flat since switching to verds. I can report they patch just fine with a piece of old mich tube and glue. Many miles and no problems. Verds+Veloflex 23= carpet ride. Can't believe how well my caad9 rides with this combo.

Correctly installing ZIPP valve extenders was an exercise in near futility this afternoon. It should've been straight forward per the youtube vids, but it was one irritating mis-step after another compounded by a general lack of compassion from the valve extenders themselves. I was clearly doing it wrong ... the tube would hold air and the valve worked great until I put on the extender. I'd take it off and it'd work great. Rinse, repeat. What a freaking PITA! It went so great that my wife just about signed me up for anger mgmt classes.

I'm grudgingly sticking with the "almost 60mm" Vredesteins for now and bummed out about losing $20 on two extenders and another $30 potentially from the two tubes I fooled around with. Should've just bought new tubes with proper length valve stems...

So, where can I find latex tubes that are long enough to fit Reynolds' 46mm rims? No Michelin. My preference is Challenge, but am somewhat open-minded.

_________________
My sub-5.7kg / 12.53lb Addict R1

WTB: Challenge latex tubes, 700c x 60mm - NEW only

Were you losing air during inflation - if yes, did you use plumbers tape on the valve stem threads that engage with the valve extender?

Yeah, I used the tape. I initially used too much so the valve core wasn't sliding and then got it figured out better. I think I wrecked the first valve core upon removal, so I didn't exactly dominate straight out of the gates. The first tube with extender installed didn't take any air. Then then next one leaked at the extender or core Then my pump cylinder loosened up so it wasn't pumping air, which took me more time to figure out. It clearly wasn't my day... Thanks for trying to help!

Anyone know what's the deal with Challenge?! They seemed to get a bad wrap lately, so I'm wondering if Challenge stopped production to address it? Then again, maybe the 60mm version is just plain old back ordered since there's plenty of 47mm versions available.

_________________
My sub-5.7kg / 12.53lb Addict R1

WTB: Challenge latex tubes, 700c x 60mm - NEW only

Just had my first experience with Vredestein latex tubes and thought I'd share. I got the 40mm versions and they weighed in at 47g, which is pretty impressive in my book. What sucked though, were the valve cores. They just didn't work properly, both when pumping air in and when trying to push the air out. Replaced them both with valve cores from other tubes that I had lying around..

Not sure if that's a common problem or I got my tubes from a bad patch.

Hi,



Not sure where the problem originated but rest assured, it is not typical of these inner tubes. Fortunately valve cores are easily replaced.

Ciao,

_________________
Being a snob is an expensive hobby.