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Old January 19th 17, 08:16 PM posted to rec.bicycles.tech
Joerg[_2_]
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Posts: 6,016
Default Stronger rubber cement?

On 2017-01-18 17:36, Phil Lee wrote:
Joerg considered Mon, 16 Jan 2017
10:01:41 -0800 the perfect time to write:

On 2017-01-05 08:31, AMuzi wrote:
On 1/5/2017 9:59 AM, Joerg wrote:
On 2017-01-05 07:34, wrote:
On Wednesday, January 4, 2017 at 8:47:35 PM UTC-8, Phil
Lee wrote:
Joerg considered Wed, 04 Jan
2017
07:38:10 -0800 the perfect time to write:

On 2017-01-04 01:19, Tosspot wrote:
On 04/01/17 01:04, Joerg wrote:
Gentlemen,

Is there something stronger than the usual rubber
cement in
the patch kits? Ideally something that won't dry out
so fast
or where multiple cheap small tubes are available.

The reason is that I sometimes have larger holes from
side
wall blow-outs. Not inch-long gashes but one or two
tenths of
an inch long. The tubes I use are super thick and,
therefore,
expensive. $15-20 each and that's not something to be
thrown
out lightly. Instead of the li'l REMA patches I need
to use
thicker rubber from an older sacrified tube but this
has to
be vulcanized/cemented really well.

UK, but must be available all over

http://www.tyre-equipment.co.uk/acat...r-Patches.html






Go up to 180mmx95mm and are less than a UKP per patch.


Thanks! Time for a trip to the autoparts store since
there is

http://www.vipal-usa.com/repair_line_e.html

Looks like a Brazilian company.


The 30mm patches are 13 squids per 100! Surely, surely
even
Joerg can't get through that amount that fast!


I hardly get flats but when I do they are hardcore.
Typically
caused by those notorious #%&^!! flimsy side walls of
bicycle
tires. Which is also why I am always on the lookout for
tires
with better side walls. For the MTB I found that Asian
ones do
better in that domain but haven't found any yet for the
road
bike. Will try CST, their Conquistare tires look
promising but I
could not find reviews.

Heavier tires are generally better and finally those
appeared for
29". For 700c it's still slim pickens.

You do know that 29" ARE 700c, both using a bead seat
diameter of
622mm? It's just that one description is used for MTB and
the other
for road use.

I have been told that many times. But my CX bike feels
absolutely
NOTHING like the 29er did. On that the wheels felt massive
and heavy.
On the CX bike they are nothing of the sort.


Phil should try to mount a 29" Intense Trail Taker tire or
similar on a 700c road bike. Then it would quickly sink in
why this will never work :-)


Joerg, don't be ridiculous. Phil Lee was correct.


Tires formally labeled as 29" are simply not available in 25mm. At least
AFAICT.

I know you struggle with the real world, and complex mathematical
concepts like wheel diameters, but surely even YOU can add 2x 25mm to
622mm, and conclude that the result is less than 29"!
Just in case, 672mm = 26.46, or in round figures, 26 1/2", so it's
hardly surprising that it is not mislabeled as 29"!

A 559mm 26x2.3 tire will mount on the rim but can't possibly fit inside
the frame or fork of a Bridgestone CB1. So what? A perfectly common
700-35C touring tire won't clear in your road bike either.

That unsuitably wide tires exist for any given rim diameter in any given
frame doesn't make them different ISO sizes. There are a spectrum of
widths for almost every ISO format, choice is good!


Well, there aren't skinny 29" tires.

The thing you need for compatibility is BEAD SEAT DIAMETER, which is
622mm for both the so-called 29" (which isn't really 29" except in
2.25" width, and even then only roughly), and so-called 700C (which
again, isn't really 700mm in diameter in anything other than 39mm
width either). The move from using overall diameter of a mounted and
inflated tyre to the use of bead seat diameters, as approved by ISO
and ETRTO is because it is only by using the bead seat diameter that
you can tell which tyre fits which rim.
And any 29", 700C, xx-622 will fit your rims, whatever width it may
be. Of course, it may not be the ideal width for the rim, or too wide
for the frame or forks, but it WILL mount on the rim.

GET IT?


The thing you need is the tire to _fit_ _through_ the chain stay. _No_
29" tire does on my road bike.

Get it now?


I can only hope that you never have to deal with the complexities of
the various 26" formats!

p.s. A 700-18 ultralight tire would fit your road bike rim as well. For
you, I'd suggest a wider tire.


Yes, I had very narrow tires before and found that 25mm is better for
where I now ride. 28mm would theoretically fit but only when the rear is
very well trued which does not hold for long on my routes. I am also not
very talented for trueing a wheel.


Maybe that (along with your notable level of machinery abuse) is the
real reason you insist that only disk brakes are worth using.


They are vastly superior to rim brakes in rain, mud, sleet et cetera.
Any MTB rider worth their salt knows this.

Oh, they have a "minor" additional advantage: They do not eat rims.

--
Regards, Joerg

http://www.analogconsultants.com/
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