TdF rain tires ?

Is there a Euro race rain tire ?

On Sat, 17 Sep 2011 20:12:29 -0700 (PDT), kolldata
wrote:

Is there a Euro race rain tire ?

Yep. It's called "Raining Tires".
http://www.sploder.com/games/members/maximium/play/its-raining-tires/
Not very racy, but you can use your imagination.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On Sat, 17 Sep 2011 20:12:29 -0700 (PDT), kolldata
wrote:

Is there a Euro race rain tire ?

Car tires with volcanic sand to improve traction. It should also work
with bicycle tires:
http://www.azom.com/news.aspx?newsID=2092
Find an unpronounceable foreign language product name, add some
colorful looking logos, double the price, and you have instant Euro.



--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On Sep 17, 8:52 pm, Jeff Liebermann wrote:
On Sat, 17 Sep 2011 20:12:29 -0700 (PDT), kolldata

wrote:
Is there a Euro race rain tire ?

Car tires with volcanic sand to improve traction.

Sand (?)... *improves* (?) traction?? That's a new one to me.

Riding home from work last week - out the door it was sprinkilng
already. On out of town and I got into a few light downpours. First
rain in quite a while. This of course can create a grease on the road
surface. One particular hard turn at the bottom of a steep descent -
Got adrenaline?

snip

On Sep 17, 8:52 pm, Jeff Liebermann wrote:
On Sat, 17 Sep 2011 20:12:29 -0700 (PDT), kolldata

wrote:
Is there a Euro race rain tire ?

Car tires with volcanic sand to improve traction. It should also work
with bicycle tires:
http://www.azom.com/news.aspx?newsID=2092
Find an unpronounceable foreign language product name, add some
colorful looking logos, double the price, and you have instant Euro.


Ah.. after reading a bit of that, now I can sor tof theoretically
imagine a tire with pumice in the compound - maybe on *part* of the
tire and in concert with a tread pattern - which could scrub at the
greasy wet stuff to give a bit of clean pavement for the rubber to
grab (though it doesn't sound like this is their concept).

(I was out in the fields that day the ash from Mt St Helens started
falling on everything.)

On Sun, 18 Sep 2011 09:49:10 -0700 (PDT), Dan O
wrote:

On Sep 17, 8:52 pm, Jeff Liebermann wrote:
On Sat, 17 Sep 2011 20:12:29 -0700 (PDT), kolldata

wrote:
Is there a Euro race rain tire ?

Car tires with volcanic sand to improve traction. It should also work
with bicycle tires:
http://www.azom.com/news.aspx?newsID=2092
Find an unpronounceable foreign language product name, add some
colorful looking logos, double the price, and you have instant Euro.

Ah.. after reading a bit of that, now I can sor tof theoretically
imagine a tire with pumice in the compound - maybe on *part* of the
tire and in concert with a tread pattern - which could scrub at the
greasy wet stuff to give a bit of clean pavement for the rubber to
grab (though it doesn't sound like this is their concept).

Tossing sand on locomotive tyres on grades is a common way of
improving traction on rails.

The above article claims that
"...the volcanic sand "grit" presents microscopic cavities
that work as tiny traction edges for better grip on slick
surfaces."
My guess(tm), is that the pumice cavities in the rubber would act as
miniature suction cups or perhaps paddles.

(I was out in the fields that day the ash from Mt St Helens started
falling on everything.)

While in college (about 1967), I attended a demonstration of braking
distance on automobiles. The wet skid pad test was rather spectacular
as the tires hydroplaned and vehicle spun out. I made an 8mm home
movie of the event, and viewed it over and over looking for ways to
improve wet pavement braking. I noticed that there was a wave of
water ahead of the tire, and that the tire was trying to ride up onto
the wave. My solution was to install an air compressor in the
vehicle, air nozzles attached to the brake mounts, and blow air across
the wave until I could see dry pavement. Although the contraption was
awkward, unweildy, ugly, noisy, complex, and potentially expensive, it
worked amazingly well. By removing the (water) lubricant, the vehicle
stopped just like on dry pavement. I don't want to discuss what
happened to the idea. Of course, it's useless for a bicycle, which
has rounded tires, insufficient speed, and therefore no bow wave.


--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On Sep 18, 12:21 pm, Jeff Liebermann wrote:
On Sun, 18 Sep 2011 09:49:10 -0700 (PDT), Dan O
wrote:



On Sep 17, 8:52 pm, Jeff Liebermann wrote:
On Sat, 17 Sep 2011 20:12:29 -0700 (PDT), kolldata

wrote:
Is there a Euro race rain tire ?

Car tires with volcanic sand to improve traction. It should also work
with bicycle tires:
http://www.azom.com/news.aspx?newsID=2092
Find an unpronounceable foreign language product name, add some
colorful looking logos, double the price, and you have instant Euro.
Ah.. after reading a bit of that, now I can sor tof theoretically
imagine a tire with pumice in the compound - maybe on *part* of the
tire and in concert with a tread pattern - which could scrub at the
greasy wet stuff to give a bit of clean pavement for the rubber to
grab (though it doesn't sound like this is their concept).

Tossing sand on locomotive tyres on grades is a common way of
improving traction on rails.

The above article claims that
"...the volcanic sand "grit" presents microscopic cavities
that work as tiny traction edges for better grip on slick
surfaces."
My guess(tm), is that the pumice cavities in the rubber would act as
miniature suction cups or perhaps paddles.

(I was out in the fields that day the ash from Mt St Helens started
falling on everything.)

While in college (about 1967), I attended a demonstration of braking
distance on automobiles. The wet skid pad test was rather spectacular
as the tires hydroplaned and vehicle spun out. I made an 8mm home
movie of the event, and viewed it over and over looking for ways to
improve wet pavement braking. I noticed that there was a wave of
water ahead of the tire, and that the tire was trying to ride up onto
the wave. My solution was to install an air compressor in the
vehicle, air nozzles attached to the brake mounts, and blow air across
the wave until I could see dry pavement. Although the contraption was
awkward, unweildy, ugly, noisy, complex, and potentially expensive, it
worked amazingly well. By removing the (water) lubricant, the vehicle
stopped just like on dry pavement. I don't want to discuss what
happened to the idea. Of course, it's useless for a bicycle, which
has rounded tires, insufficient speed, and therefore no bow wave.


.... but might repel bits of glass and other puncture hazards
(unweildy, though, yes).

On Sep 18, 5:13*am, Phil W Lee wrote:
kolldata considered Sat, 17 Sep 2011 20:12:29
-0700 (PDT) the perfect time to write:



Is there a Euro race rain tire ?

Why would you want a different one?
For racing cycles, where overheating is not a problem you need to
worry about, you will already be using the grippiest tyre you can
anyway - who cares if it only lasts one day if it wins you
races/stages?

The greatest difference for the TdF is the swept roads, but you're
unlikely to see any track tyres. The grippiest tyre compound will
generally be a hinderance for it will create more drag to tire the
rider over a long stage. Grippy tyres may be useful only in 40 minute
criteriums for the inexperienced racer. This is presuming the rider
WILL take full advantage of the increased cornering power at every
opportunity.


You don't need any grooves, because that would just reduce the area of
rubber in contact with the road.http://www.sheldonbrown.com/tires.htmland scroll down to
"Hydroplaning", where you will find that at typical cycle racing tyre
pressures, you'd need to be going at over 100mph to aquaplane.

The formula is that it only becomes a risk when speed in knots is 9x
the square root of the tyre pressure in psi.

So what anchor weight do I use?

So even at 40psi, you'd need to be going at over 66mph for there to be
a risk (not a certainty - this formula was calculated by the aviation
industry, which is highly risk-averse, and is the guaranteed safe
speed).

Aeroplane pilots don't usually want to make a 30' radius turn at
30mph .


So in the dry, you want the stickiest slick tyre you can get your
hands on, and in the wet, you want the same.

Bull****.

On Sun, 18 Sep 2011 12:54:27 -0700 (PDT), Dan O
wrote:

... but might repel bits of glass and other puncture hazards
(unweildy, though, yes).

Or launch the road debris at pedestrians and other cars. This was
(probably) why my idea was ultimately rejected. When operating, the
compressed air sprayed water everywhere which was useful for soaking
visitors and officials. However, we became more careful when someone
noticed that it was also spraying pebbles at them.






--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On Sep 17, 9:13*pm, Phil W Lee wrote:
kolldata considered Sat, 17 Sep 2011 20:12:29
-0700 (PDT) the perfect time to write:



Is there a Euro race rain tire ?

Why would you want a different one?
For racing cycles, where overheating is not a problem you need to
worry about, you will already be using the grippiest tyre you can
anyway - who cares if it only lasts one day if it wins you
races/stages?

You don't need any grooves, because that would just reduce the area of
rubber in contact with the road.http://www.sheldonbrown.com/tires.htmland scroll down to
"Hydroplaning", where you will find that at typical cycle racing tyre
pressures, you'd need to be going at over 100mph to aquaplane.

The formula is that it only becomes a risk when speed in knots is 9x
the square root of the tyre pressure in psi.

So even at 40psi, you'd need to be going at over 66mph for there to be
a risk (not a certainty - this formula was calculated by the aviation
industry, which is highly risk-averse, and is the guaranteed safe
speed).

So in the dry, you want the stickiest slick tyre you can get your
hands on, and in the wet, you want the same.

verrrry interesting. and of Trevor - maybe the hardness doesn't count
more than ???
anyway, to rephrase....if rain begins forcast to continue uhhh like
Brittany ? are there rain tires/rims to mount giy or does time lost
there mitigate all road time savings ?
Remeber Cancellera ? now there's a rain tire use age.