Shane Gibson

Nice email write up from John here.

Often, a new tire (particularly folded/folding) tires will not seat if it's
not tubeless specific, the casing needs to be inflated around the rim for a
while to "take the shape" before it'll seat. In these cases, I've just
thrown a tube in for a couple of weeks, until the tire has taken and holds
the rim shape well. You'd be surprised how much of a difference it makes
in getting the initial seal on a tubeless setup, (especially tires not
specifically designed/called tubeless). I've fought for well over an hour
or so trying to seat a set of tires - after giving up, throwing tubes in,
and waiting a couple of weeks - they'll seat/seal without any problems.

Okay - an insanely important test ... ****ESPECIALLY**** for low volume
casings (i.e. CX tires - more so than MTB tires), once you *do* get it
seated and sealed tubeless, take the tire pressure down to the absolute
lowest pressure setting you'd run the tire. Including the last minute on
the start line, pssst ... pssst ... pssst levels that a lot of peeps take
their tires to (you know the sudden panic sets in, oh gawd, I think I have
too much pressure ... pssst ... psst ... pssssssssssst) - level you
actually end up racing at...

Then, take the tire at that lowest pressure level, and try and unseat the
bead by hand. Try and manually roll the tire off/out of the rim. If
you're not a big beefy Clydesdale dude ... get a buddy who is ... to do
this for you. I have rolled several seemingly well seated/sealed tires
right off the rim. If I can do that by hand - I don't want to see it roll
off the rims at high speed cornering on a CX course when I torture it in
real world conditions ...

Good luck!

~~shane

--
"Opportunities multiply as they are seized." - Sun Tzu

On Mon, Nov 14, 2011 at 12:15 PM, john wrote:

> Either is fine if you stay under 45 psi or so...
>
>
> I think each tire-to-rim is a case by case basis. If you go to Stan's
> notubes forum and poke around you can start getting a good feel. It can
> be a little frustrating with the lack of info or scattering of it... My
> experience/thoughts/opinion.
>
> - I think the stan's rims do a a little better because their "bead socket
> technology". (Note I don't have much experience with tubeless with other
> rims

john

Either is fine if you stay under 45 psi or so...

I think each tire-to-rim is a case by case basis. If you go to Stan's
notubes forum and poke around you can start getting a good feel. It can be
a little frustrating with the lack of info or scattering of it... My
experience/thoughts/opinion.

- I think the stan's rims do a a little better because their "bead socket
technology". (Note I don't have much experience with tubeless with other
rims

Ian Mastenbrook

You NEVER want to mount a wire bead tire to a tubeless wheel. Wire beads
will stretch easily and blow the tire off the rim. Kevlar is perfectly fine
for mountain bike because the pressure doesn't exceed 40psi. You can use
tubeless specific tires and most non-tubeless tires will also set up for
tubeless.

For road tubeless you ONLY want to use tubeless specific tires with a
carbon bead, so the bead wont stretch at all and cause it to blow off the
rim.

For seating the bead I recommend soapy water and an air compressor. Also,
take the valve core out and just use a blow gun so you can get more air in
the tire to seat the bead.

Here is a little video I did over the summer on mounting up a road tubeless
tire, basically the same instructions as a mountain bike tire
http://youtu.be/F0J4YsA8grQ

On Sun, Nov 13, 2011 at 6:56 PM, Melissa Boyd wrote:

> Asking the OBRA experts:
>
> I'm buying a set of tires for some tubeless rims (26" NoTubes Alpine
> rims). They come in both wire-bead and folding (kevlar bead) models. Which
> type will be easier to get to seal on the rims, wire or folding? Or does it
> matter?
>
> Thanks!
>
> Melissa
>
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>
>

--
*-Ian Mastenbrook*

Melissa Boyd

Asking the OBRA experts:

I'm buying a set of tires for some tubeless rims (26" NoTubes Alpine rims).
They come in both wire-bead and folding (kevlar bead) models. Which type
will be easier to get to seal on the rims, wire or folding? Or does it
matter?

Thanks!

Melissa