On 2018-05-07 18:28, jbeattie wrote:
On Monday, May 7, 2018 at 4:39:31 PM UTC-7, Joerg wrote:
On 2018-05-07 14:03, jbeattie wrote:
On Monday, May 7, 2018 at 12:50:15 PM UTC-7, Joerg wrote: snip
[...]
Pictures Doug posted earlier clearly showed compromised and
frayed threads. These do not re-gain any strength whatsoever
from such a cosmetic "repair". It's like smearing Bondo over a
structural crack on a vehicle. We all know what can happen if
the front road bike tire blows on a fast downhill section of
road.
Doug says it was minor and nothing in the pictures indicates a
serious problem.
Not serious? Put on your glasses and look again at the left side
he
https://www.dropbox.com/s/1z270cz94b...30730.jpg?dl=0
Even here you can see the thread starting to fray and fail almost
everywhere along a sort of "equator line":
https://www.dropbox.com/s/ao5r35u5y7...30742.jpg?dl=0
That tire belongs on the trash heep and that's where mine went.
I didn't see the first one, but I'm still not concerned. It's not
bulging, and if I were worried and didn't want to trash the tire
(they're not cheap), I'd put a patch behind the scuff and throw some
Shoe Goo on it.
I know people who even think about their car tires that way. Some
threads showing? Aw, heck!
Assuming his casing scuff developed into a casing failure (which
I doubt), he would get a rear blow-out -- or just a rear flat if
the resulting hole were small. He could fold-over a dollar bill,
boot the tire, put in a spare tube and ride home. Yawn. None of
this will or could happen if he just kept an eye on the tire,
which he is doing. Bad casings will bulge long before they burst,
if they every burst.
And what do you do for the front? Bikes have two wheels. Call your
wife from the hospital that dinner is off tonight, and the next
10-20 days?
Wow, you're a nervous nelly. And what about the front? We're talking
about a rear wheel and a casing scuff. If it were on the front tire,
I'd keep an eye on it. I've ridden front tires booted with a $1 bill
for many, many miles.
If I see this on a tire, it'll be gone after I get home.
But things are different out in the wild west Jay. Imagine
a blowout when the mountain lions are circling. ...
I had cattle around me when that happened last time. The
kaboom made them run away. Luckily that didn't cause a stampede
of the rest of the herd. Strangely, while I was cleaning up the
pieces that had flown off the bike they came back. Probably
curious enough to see what's going on.
Pieces flying off the bike? What? Do you run your tires at
1,000 PSI? Are you using your wheels for shotgun target
practice?
No, 55-60psi, gnarly section with loose rocks. Rear came off the
ground, landed ... *KABOOM* ... thwock. A chunk of tire flew off
and smashed the rear light off of the bike. The remnants of the
light were found in numerous pieces in a 10ft radius around where
the kaboom happened (took a while to get the MTB to a stop,
downhill). It also took out a charge controller circuit board for
the Li-Ion lighting battery. Then some metal pieces. Plus a hole in
the trunk bag.
I learned my lesson from that. Now anything electronic is in ABS
and cast aluminum enclosures. That and the upper trunk are
protected by an aluminum strut that is shaped as a U-profile. The
top trunk now rides on a plywood plate which also allows me to
quickly move it between MTB and road bike or use the bare plate to
faster larger loads.
http://www.analogconsultants.com/ng/bike/Muddy4.JPG
The bike still looks the same except now it has 8" rotors front and
back.
There is also a third protection layer in the shape of a thick
aluminum false bottom below, mainly to catch rocks, mud and stuff:
http://www.analogconsultants.com/ng/bike/Rack1.JPG
This has turned out to be almost indestructible but you have to
make such stuff yourself. The industry doesn't get it.
Once again, we're talking about a scuffed road tire and not some epic
smashing of a MTB tire on rocks. You're talking about riding a
scuffed tire as terribly dangerous, yet every story is about
exploding tires on gnarly trails and physical conditions that tax
ordinary bicycles. For you, maybe a scuff is fatal. On a normal
road bike not so much.
Yeah, right. As a kid I had a front blow-out in a tunnel on the way back
home from school. Just a normal paved road. Narrow one-lane tunnel and I
wanted to beat the traffic light that guided direction. The long descent
before the tunnel helped me get to speed. I must have hit some sort of
pothole in the fairly dark tunnel ... *KAPOW* ... I did come out of that
tunnel but separated from my road bike and the school pack came rolling
out last according to the first driver waiting at the light on the other
side. The front tire had popped. For a few days I had to sleep on one
side because the other hurt a lot.
--
Regards, Joerg
http://www.analogconsultants.com/