On 2017-08-31 14:49, 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?

As usual - no. Weight from Mr. Tuffy's is insignificant. Construction
foam would cause a tire to fail almost immediately. First by breaking
it up into chunks and then collapsing it.

There is tubeless tires and sealant but these will not handle cuts or
tears in the sidewalls of fat tires. If you can get the tube type
from which you can extract the presta fitting then you can put in
large amounts of sealant into the tube. When using this sealant you
have to always stop or park the bike with the fill on the bottom of
the wheel.


You can get tubes (including 700c sizes and their thick versions) with
sealant but I'll never do that again. Had it on the MTB for over half a
year. Eventually there will be so many supposedly "sealed" punctures
that the tire starts oozing green stuff, you'll have permanent slow
leaks and it soils the garage floor. A friend even got it on his carpet.
This was the point where I went with the thickest tubes obtainable plus
tire liner plus regular tubes sleeved over the tire liner. Never had a
flat again otehr than violent blow-outs (side wall failures and such).


All presta valves used to screw out but the times I've tried it
recently was on cheap tubes and they were somehow fixed inside the
nozzle.


A firned (the one where the sealant got on the carpet) had a big
canister of green sealant. At least a gallon, and it didn't last long.

--
Regards, Joerg

http://www.analogconsultants.com/