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Old September 5th 17, 10:15 PM posted to rec.bicycles.tech
AMuzi
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Posts: 13,447
Default Mr.Tuffy liner for road bikes ok? Or 2nd tube?

On 9/5/2017 4:05 PM, Doug Landau wrote:
On Tuesday, September 5, 2017 at 12:22:22 PM UTC-7, AMuzi wrote:
On 9/5/2017 1:29 PM, Joerg wrote:
On 2017-09-05 10:29, Doug Landau wrote:
On Saturday, September 2, 2017 at 7:36:16 AM UTC-7, Joerg
wrote:
On 2017-08-31 17:38, Doug Landau wrote:
On Thursday, August 31, 2017 at 11:55:06 AM UTC-7, Joerg
wrote:
Yesterday I had another two (!) sidewall punctures.
Long story
short I will definitely not recommend CST Conquistare
tires.
Wore out in less than 1200mi and then weakened which is
just
unacceptable. So thumbs down from me.

This brings up two questions:

1. The Mr.Tuffy orange liners for 700c narrow tires.
They must
be laid in with a wee overlap. Will that overlap cause
a 700c
25mm tire at 110psi to run bumpy? Like whop .. whop ..
whop
every time the overlap comes around?

2. What about taking a second (otherwise discarded)
thorn-resistant tube, slit it open on the inside and
slide it
over the real thorn-resistant as a 2nd layer?

The problem is that Kenda seems to have discontinued
selling
thorn-resistant tubes with good and most of all same
thickness
all around but now the thickness tapers off towards the
sidewalls. That's where they fail. Same for Sunlite
which I had
to re-order yesterday because those things are essentially
unfixable with those thin REMA patches.

Any words of wisdom? As usual, weight absolutely does not
matter.

In case anyone knows: I read somewhere that smugglers
"inflate"
their vehicle tires with some sort of hardening sealant
(Silicone? Construction foam?) that makes the tires
bullet-proof. What material is it and how do they get
it in
there thoroughly enough? Would it be good for a couple of
thousand miles?

Those who are serious about not getting flats make their
own mr
tuffys from old tires


How do you do the overlap? It has to be cut because the
radius
inside is a smidgen smaller than normal.

I was thinking about making my own Mr.Tuffy from a 2nd
thorn-resistant tube that is slit open lengthwise on the
rim side.
I'll see when the new tube gets here next week. There
should be
enough compliance in the rubber so there won;t be any
wrinkles.
Hopefully. The othe issue is that the smallest these
tubes come is
700 x 23/25mm and even 23mm is a bit large if there is a
another
thick tube in there.

Fraid I either did not ask or don't remember. I remember
the part
about removing the bead, but that's obvious. Mostly I
remember the
conclusion, made simply with no effort to convince: "...
and I don't
get flats".


That's exactly the objective. To heck with weight.

I have tire liner on order which will go in on top of thick
thorn-resistant tubes. We'll see.



For equipment with more troubles than yours ( construction
site vehicles) the accepted solution of to fill the tires
with something besides compressed air.


- accepted? Don't those things break down after a few hundred hours?


Foam fill? Nope. Solid urethane are more for indoor
warehouse use now. These are no longer new, mysterious
technologies.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


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