Rick Johnson

For trimming those little tire "spines" - as you call them - you'll
find these type of pliers invaluable:







They are designed for cutting very small electronic wires cleanly - and
it just so happens they cut exactly flush with whatever surface they're
against. They work ideal for tubeless prep - and also trimming the
tails off zip ties (you'll never slash your arm on the stub again).



They can be purchased here for
about $6 and can sometimes be found even at places like Home Depot.



Rick

Rick Johnson

Bend, Oregon

Every revolutionary idea seems to evoke three stages of reaction...

One, it's completely impossible. 

Two, it's possible, but it's not worth doing. 

Three, I said it was a good idea all along.

Arthur C. Clarke

Todd.Dye@CH2M.com wrote:

  

I ran Stan's sealant in my clincher tubes last year.  

  

    

I've been running Stan's in my Mountain Bike (which I also use for CX

racing) for years.  I've also used Stan's with non-tubeless tires

without too many problems.  I have the Continental Cross Country 1.5" on

my rear wheel.  The Conti has little "spines" along the outside edge of

the where the tire clinches into the rim.  I had to trim these off with

a very very sharp utility knife, since this kept creating "pockets" that

were really hard to seal.  Before I figured that out - I had a burp flat

at Washington County Fairgrounds this year.  I had a bunch of Stan's in

the tire.  When I blew it back up with canned air - the Stan's blew out

and helped to seal the clinch to the rim beautifully. 

In summary - I'm a big advocate for the Stan's No Tubes goop.  Seems to

work great.  I've found an occasional hole that Stan's sealed right up

that I had no idea had occurred.  Good stuff.

v/r

Shane

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Shane Y. Gibson

Todd.Dye@CH2M.com wrote:
> I ran Stan's sealant in my clincher tubes last year.
>

I've been running Stan's in my Mountain Bike (which I also use for CX
racing) for years. I've also used Stan's with non-tubeless tires
without too many problems. I have the Continental Cross Country 1.5" on
my rear wheel. The Conti has little "spines" along the outside edge of
the where the tire clinches into the rim. I had to trim these off with
a very very sharp utility knife, since this kept creating "pockets" that
were really hard to seal. Before I figured that out - I had a burp flat
at Washington County Fairgrounds this year. I had a bunch of Stan's in
the tire. When I blew it back up with canned air - the Stan's blew out
and helped to seal the clinch to the rim beautifully.

In summary - I'm a big advocate for the Stan's No Tubes goop. Seems to
work great. I've found an occasional hole that Stan's sealed right up
that I had no idea had occurred. Good stuff.

v/r
Shane

david baker

I agree with Todd's assessment.
If you really want to run lower pressure and have tubes, then put tubes in
tubeless tires on a tubeless wheel set. You could put sealant in the tube
AND in the tire. That would be like triple protection! If I only put
sealant in one or the other I think I would put it in the tire first.
You really are paying a weight penalty at that point, but I would not lower
the normal pressure for clinchers with tubes just because you put sealant
in.
My experimentation with tires has led me to always use tires for the
intended purpose.
Basically for one race I would not bother.
Next year just get a tubeless wheel set and tubeless tires and forget all
the other junk.
----- Original Message -----
From:
To:
Sent: Friday, November 06, 2009 4:33 PM
Subject: Re: [OBRA Chat] Sealant in clinchers for CX?

>I ran Stan's sealant in my clincher tubes last year. Michelin Mud2s on Open
>Pros at 38 PSI front/42psi rear with no flats (~12 races).
>
> I pulled the tires after the last race, and found 3 or 4 punctures in the
> tubes that the sealant had sealed up. The sealant will stop smaller
> punctures, but it won't seal up a pinch flat, unless it's a very minor
> pinch that only barely cut the tube. I've pinch flatted this setup a
> bunch of times while riding my cross bike on singletrack, and I've found
> that the sealant will slow down the air leak just enough for you to ride
> 30 yards further and bottom out the tire 3 or 4 more times, leaving you
> with about 6 or 8 holes in the tube.
>
> I'd still recommend running the sealant as a bit of extra insurance
> against punctures, but I wouldn't recommend lowering your tire pressure
> because you've got sealant in the tubes.
>
> If you're going to go this route, get tubes with a removable valve core.
> Quality's house brand Q tubes (made by Kenda) have removable cores, and
> just about any shop will either have these or can get them easily. The
> big bottle of Stan's sealant comes with a syringe that makes it super easy
> to inject the sealant right in the valve stem. The sealant will dry out
> over time, forming little "marbles" of dried sealant that rattle around in
> the tubes. Not a huge deal, but there is no good way to get those out.
>
> While this is a step up in flat protection over plain old tubes, I'm far
> happier with the tubeless setup I'm running this year (Stan's ZTR 355
> w/Mich Mud2, ~32-35 psi front/rear). The ride is far more supple without
> the tubes (even at the same pressure and even better at lower pressure),
> and I've not had any burping issues with those tires in 7 or 8 races and
> weekly cross skills workouts (remounts, cornering, starts etc..).
>
>
>
>
> -----Original Message-----
> From: obra-bounces@list.obra.org [mailto:obra-bounces@list.obra.org] On
> Behalf Of Sarah Tisdale
> Sent: Friday, November 06, 2009 3:44 PM
> To: obra
> Subject: [OBRA Chat] Sealant in clinchers for CX?
>
> Excerpt from http://velonews.com/article/99811
>> Technical Q&A with Lennard Zinn - It's all about the tires By Lennard
>> Zinn
>> Published: Nov. 3, 2009
>> [...]
>> On clinchers, I use the bigger 700 X 35-42C inner tubes so that the
>> tube is not stretched very much inside, which would open a puncture
>> hole bigger. And I just stick the hose of the syringe injector right
>> over the valve and shoot it right in through the valve core. The valve
>> works fine afterward.
>> [...]
>
>
> I've often wondered if anyone put sealant into CX clinchers. This is the
> first I've heard of someone doing it. It seems like an excellent way to
> run low tire pressures on clinchers with lower risk of pinch flats. No
> chance of tubeless "burping". None of the hassle of gluing tubulars. Not
> particularly lightweight, but seems a super-simple way to run lower
> pressures with clinchers more safely.
>
> Any heard of this before? Any OBRA-ites doing this? How's it working for
> you?
>
> I might try it this weekend at SSCXWC on my single-speed clincher rear
> wheel. I'd like to run it at low pressure, but don't want to risk a pinch
> flat!
>
> Thanks,
> Sarah
> _______________________________________________
> OBRA mailing list
> obra@list.obra.org
> http://list.obra.org/mailman/listinfo/obra
> Unsubscribe: obra-unsubscribe@list.obra.org
> _______________________________________________
> OBRA mailing list
> obra@list.obra.org
> http://list.obra.org/mailman/listinfo/obra
> Unsubscribe: obra-unsubscribe@list.obra.org
>

Todd.Dye@CH2M.com

I ran Stan's sealant in my clincher tubes last year. Michelin Mud2s on Open Pros at 38 PSI front/42psi rear with no flats (~12 races).

I pulled the tires after the last race, and found 3 or 4 punctures in the tubes that the sealant had sealed up. The sealant will stop smaller punctures, but it won't seal up a pinch flat, unless it's a very minor pinch that only barely cut the tube. I've pinch flatted this setup a bunch of times while riding my cross bike on singletrack, and I've found that the sealant will slow down the air leak just enough for you to ride 30 yards further and bottom out the tire 3 or 4 more times, leaving you with about 6 or 8 holes in the tube.

I'd still recommend running the sealant as a bit of extra insurance against punctures, but I wouldn't recommend lowering your tire pressure because you've got sealant in the tubes.

If you're going to go this route, get tubes with a removable valve core. Quality's house brand Q tubes (made by Kenda) have removable cores, and just about any shop will either have these or can get them easily. The big bottle of Stan's sealant comes with a syringe that makes it super easy to inject the sealant right in the valve stem. The sealant will dry out over time, forming little "marbles" of dried sealant that rattle around in the tubes. Not a huge deal, but there is no good way to get those out.

While this is a step up in flat protection over plain old tubes, I'm far happier with the tubeless setup I'm running this year (Stan's ZTR 355 w/Mich Mud2, ~32-35 psi front/rear). The ride is far more supple without the tubes (even at the same pressure and even better at lower pressure), and I've not had any burping issues with those tires in 7 or 8 races and weekly cross skills workouts (remounts, cornering, starts etc..).

-----Original Message-----
From: obra-bounces@list.obra.org [mailto:obra-bounces@list.obra.org] On Behalf Of Sarah Tisdale
Sent: Friday, November 06, 2009 3:44 PM
To: obra
Subject: [OBRA Chat] Sealant in clinchers for CX?

Excerpt from http://velonews.com/article/99811
> Technical Q&A with Lennard Zinn - It's all about the tires By Lennard
> Zinn
> Published: Nov. 3, 2009
> [...]
> On clinchers, I use the bigger 700 X 35-42C inner tubes so that the
> tube is not stretched very much inside, which would open a puncture
> hole bigger. And I just stick the hose of the syringe injector right
> over the valve and shoot it right in through the valve core. The valve works fine afterward.
> [...]

I've often wondered if anyone put sealant into CX clinchers. This is the first I've heard of someone doing it. It seems like an excellent way to run low tire pressures on clinchers with lower risk of pinch flats. No chance of tubeless "burping". None of the hassle of gluing tubulars. Not particularly lightweight, but seems a super-simple way to run lower pressures with clinchers more safely.

Any heard of this before? Any OBRA-ites doing this? How's it working for you?

I might try it this weekend at SSCXWC on my single-speed clincher rear wheel. I'd like to run it at low pressure, but don't want to risk a pinch flat!

Thanks,
Sarah
_______________________________________________
OBRA mailing list
obra@list.obra.org
http://list.obra.org/mailman/listinfo/obra
Unsubscribe: obra-unsubscribe@list.obra.org

Brent Chapman

I did on my training wheels over the years which were clinchers but had to
get the tubes that the stem cores could be pulled out of to make it
"simple". Never seemed that heavy if you just used a little bit of the
lighter latex stuff.
Slime also makes pre loaded tubes, but if your worried about weight you
could also try Lite Smart Tubes from Slime. I played with those on my cross
bike also and they worked good for most stuff.

Neither stopped pinch flats all together and even if they did sometimes they
would lose so much air at the lower pressure that they would feel like they
were going to roll off in a corner..

If your worried about pinch flats and don't want to deal with tubular gluing
etc consider tubular clinchers. (even borrow some to try)
It might save you some frustration in the end.

brent

On Fri, Nov 6, 2009 at 3:43 PM, Sarah Tisdale wrote:

> Excerpt from http://velonews.com/article/99811
> > Technical Q&A with Lennard Zinn - It's all about the tires
> > By Lennard Zinn
> > Published: Nov. 3, 2009
> > [...]
> > On clinchers, I use the bigger 700 X 35-42C inner tubes so that the tube
> is
> > not stretched very much inside, which would open a puncture hole bigger.
> And
> > I just stick the hose of the syringe injector right over the valve and
> shoot
> > it right in through the valve core. The valve works fine afterward.
> > [...]
>
>
> I've often wondered if anyone put sealant into CX clinchers. This is
> the first I've heard of someone doing it. It seems like an excellent
> way to run low tire pressures on clinchers with lower risk of pinch
> flats. No chance of tubeless "burping". None of the hassle of gluing
> tubulars. Not particularly lightweight, but seems a super-simple way
> to run lower pressures with clinchers more safely.
>
> Any heard of this before? Any OBRA-ites doing this? How's it working for
> you?
>
> I might try it this weekend at SSCXWC on my single-speed clincher rear
> wheel. I'd like to run it at low pressure, but don't want to risk a
> pinch flat!
>
> Thanks,
> Sarah
> _______________________________________________
> OBRA mailing list
> obra@list.obra.org
> http://list.obra.org/mailman/listinfo/obra
> Unsubscribe: obra-unsubscribe@list.obra.org
>

Sarah Tisdale

Excerpt from http://velonews.com/article/99811
> Technical Q&A with Lennard Zinn - It's all about the tires
> By Lennard Zinn
> Published: Nov. 3, 2009
> [...]
> On clinchers, I use the bigger 700 X 35-42C inner tubes so that the tube is
> not stretched very much inside, which would open a puncture hole bigger. And
> I just stick the hose of the syringe injector right over the valve and shoot
> it right in through the valve core. The valve works fine afterward.
> [...]

I've often wondered if anyone put sealant into CX clinchers. This is
the first I've heard of someone doing it. It seems like an excellent
way to run low tire pressures on clinchers with lower risk of pinch
flats. No chance of tubeless "burping". None of the hassle of gluing
tubulars. Not particularly lightweight, but seems a super-simple way
to run lower pressures with clinchers more safely.

Any heard of this before? Any OBRA-ites doing this? How's it working for you?

I might try it this weekend at SSCXWC on my single-speed clincher rear
wheel. I'd like to run it at low pressure, but don't want to risk a
pinch flat!

Thanks,
Sarah