On 11/18/2017 1:46 PM, Joerg wrote:
On 2017-11-18 08:46, AMuzi wrote:
On 11/18/2017 10:12 AM, jbeattie wrote:
On Saturday, November 18, 2017 at 7:30:31 AM UTC-8, Joerg
wrote:
On 2017-11-16 17:05, John B. wrote:
On Thu, 16 Nov 2017 16:23:34 -0800, Joerg
wrote:
On 2017-11-16 16:09, John B. wrote:
On Thu, 16 Nov 2017 15:28:13 -0800, Joerg
wrote:
On 2017-11-16 13:21, Tosspot wrote:
On 16/11/17 20:38, David Scheidt wrote:
Tosspot wrote:
:Why do they have holes in them?
:Car discs don't, motorbike discs don't, aircraft
discs don't.
Why do
:bicycle discs have them?
Lots of high-performance car brake rotors are
drilled or slotted.
Slotting is more common on better stuff, holes can
crack. They
serve
a couple of features. One, people think they're
cool. two, they
allow the gasses that come off brake pads
somewhere to go (this
is a
non-issue with modern pads, but it was a problem
in the dark
ages).
Three, they give water somewhere to go. Four,
they improve
cooling
(increase surface area). five, the clean pads,
and reduce wear.
Gasses off a bicycle pad? Really?
Nobody drills rims, and most[1] motorbikes, which
are exposed to
the
rain don't.
Because 75 kg of me at 30 kph is the same KE as 160
kph Audi at 1.5
tonnes? Nah.
Hmmm...could it be it helps to clean them? They
aren't
dissipating the
KE, so they don't get Eeek! hot. But surely the
crud would
build up in
the holes?
I'm going to order a solid one for the front and
fit it in the
spring
and see if it makes any difference.
If you find a place (in the US or China) that sells
solid 8" or
203mm
rotors please let us know.
https://www.amazon.com/SRAM-Guide-Ul.../dp/B00XAY7CYK
or
http://www.jensonusa.com/SRAM-Guide-...te-Disc-Brake/
The SRAM brake Ultimate Brake with 950mm front discs
and 1,800 rear
discs.
Quote "ROTOR SIZES: 140, 160, 170, 180, 200mm"
I've got that already. It's not solid rotors.
I assume these are for the "go fast people".
What's so special about this stuff other than very
high prices?
Good Lord! It is made by SRAM and everyone knows that
they build super
stuff. Some of which is even used on TdeF racing
bicycles :-)
Oh, yes, right. We must bow down deeply and I should
never complain
about having to pay 10x or more than my current
solution. Another
confession. I use $10 T-shirts on all my rides instead
of $100
technicolor Spandex.
$10 is a lot of for a t-shirt! You can get them bulk for
$1.59.
http://www.shirtmax.com/adult-100-co...z-t-shirt.html
"Sport Grey are 90% cotton, 10% polyester" ... polyester is
no good for me. I also found that the collars on cheaper
T-shirts give up faster and that looks yucky. And my Costa
Rica T-shirt looks nicer anyhow, especially with mud
splatters on there.
Personally, I wear discarded paper surgical gowns or
whatever I find
in the dumpsters. My rain gear is made of trash bags --
and I steal
the plastic newspaper bags for booties. This stuff works
ten times
better than fancy t-shirts! Check out my new ride:
https://tinyurl.com/y84pzagm
A dynamo without lights. Now what does that feed? The wrath
of big brother can come down upon this rider.
You missed the African free t-shirt deal:
http://images.mentalfloss.com/blogs/...bowl-bears.jpg
Somebody's gotta win, somebody's gotta lose. Every year.
You need to ride faster in order not to lose, can be
achieved with extra low drops.
http://bostonbikeparty.com/wp-conten...0/skeleton.jpg
For events such as World Series, World Cup, Super Bowl etc
shirt vendors order large quantities of printed merchandise
with both teams. The loser brand merchandise is donated for
a charitable contribution and the charitable contribution
tax deduction. Hence the photo in Africa. I learned about
this only yesterday afternoon.
--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971