Do cyclists make better motorcyclists?

"Hugh Fenton" wrote:

Did no-one else plug a 12 degree (1 in 8) downslope into the calculator with
the White Hawk recumbent option (speed record holder?) To go 168 MPH
(270kph) seems a LITTLE dangerous!

Just out of curiosity - does anyone know what the equivalent speed
rating of a typical road bicycle tire is? What kind of problems might
you expect from using a "normal" bike tire at that kind of speed?

I'm assuming there is a correlation between the need for special
construction in automobile tires and those on a "bicycle" designed to
go more than 3x the legal speed limit in New Jersey. If the issue is
strictly one relating to heat, there would be less time to build the
heat, but much less mass (meaning they'd hit the maxmium temperature
quicker).

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $695 ti frame

"Hugh Fenton" wrote:

Did no-one else plug a 12 degree (1 in 8) downslope into the calculator with
the White Hawk recumbent option (speed record holder?) To go 168 MPH
(270kph) seems a LITTLE dangerous!

Just out of curiosity - does anyone know what the equivalent speed
rating of a typical road bicycle tire is? What kind of problems might
you expect from using a "normal" bike tire at that kind of speed?

I'm assuming there is a correlation between the need for special
construction in automobile tires and those on a "bicycle" designed to
go more than 3x the legal speed limit in New Jersey. If the issue is
strictly one relating to heat, there would be less time to build the
heat, but much less mass (meaning they'd hit the maxmium temperature
quicker).

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $695 ti frame

"Hugh Fenton" wrote:

Did no-one else plug a 12 degree (1 in 8) downslope into the calculator with
the White Hawk recumbent option (speed record holder?) To go 168 MPH
(270kph) seems a LITTLE dangerous!

Just out of curiosity - does anyone know what the equivalent speed
rating of a typical road bicycle tire is? What kind of problems might
you expect from using a "normal" bike tire at that kind of speed?

I'm assuming there is a correlation between the need for special
construction in automobile tires and those on a "bicycle" designed to
go more than 3x the legal speed limit in New Jersey. If the issue is
strictly one relating to heat, there would be less time to build the
heat, but much less mass (meaning they'd hit the maxmium temperature
quicker).

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $695 ti frame

(g.daniels) wrote:

before i am visciuosly attacked for this curiosity allow me to say
that when i did ride a real dirt bike, i dissappeared sideways in the
gravel over the hill at 80.

I did that once too. The bike was a total loss.

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $695 ti frame

(g.daniels) wrote:

before i am visciuosly attacked for this curiosity allow me to say
that when i did ride a real dirt bike, i dissappeared sideways in the
gravel over the hill at 80.

I did that once too. The bike was a total loss.

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $695 ti frame

(g.daniels) wrote:

before i am visciuosly attacked for this curiosity allow me to say
that when i did ride a real dirt bike, i dissappeared sideways in the
gravel over the hill at 80.

I did that once too. The bike was a total loss.

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $695 ti frame

Mark Hickey wrote:

wrote:


No one talks about Lance's
fantastic cornering skill in his lightning ascent at 16 mph
of the Alp d'Huez.


I dunno - I'm pretty impressed he managed to miss all those obnoxious
tourists on the way up. Then again, I guess I could say the same
about the motorcyclists (coincidentally most of them ride the same
bike I do) who were pacing the racers. Then again again, maybe they
don't HAVE to miss the tourists (after all, the mirrors pop off if
they hit someone).

Lance had some bar ends purchased from Sheldon Brown on his bike to
assist getting through the spectators.
http://www.sheldonbrown.com/lirpa.html#bayonetz.

--
Tom Sherman

Mark Hickey wrote:

wrote:


No one talks about Lance's
fantastic cornering skill in his lightning ascent at 16 mph
of the Alp d'Huez.


I dunno - I'm pretty impressed he managed to miss all those obnoxious
tourists on the way up. Then again, I guess I could say the same
about the motorcyclists (coincidentally most of them ride the same
bike I do) who were pacing the racers. Then again again, maybe they
don't HAVE to miss the tourists (after all, the mirrors pop off if
they hit someone).

Lance had some bar ends purchased from Sheldon Brown on his bike to
assist getting through the spectators.
http://www.sheldonbrown.com/lirpa.html#bayonetz.

--
Tom Sherman

Mark Hickey wrote:

wrote:


No one talks about Lance's
fantastic cornering skill in his lightning ascent at 16 mph
of the Alp d'Huez.


I dunno - I'm pretty impressed he managed to miss all those obnoxious
tourists on the way up. Then again, I guess I could say the same
about the motorcyclists (coincidentally most of them ride the same
bike I do) who were pacing the racers. Then again again, maybe they
don't HAVE to miss the tourists (after all, the mirrors pop off if
they hit someone).

Lance had some bar ends purchased from Sheldon Brown on his bike to
assist getting through the spectators.
http://www.sheldonbrown.com/lirpa.html#bayonetz.

--
Tom Sherman

Mark Hickey writes:

Did no-one else plug a 12 degree (1 in 8) downslope into the
calculator with the White Hawk recumbent option (speed record
holder?) To go 168 MPH (270kph) seems a LITTLE dangerous!

Just out of curiosity - does anyone know what the equivalent speed
rating of a typical road bicycle tire is? What kind of problems
might you expect from using a "normal" bike tire at that kind of
speed?

None required. If you read auto rags with car tests, you'll see a
bicycle wheel with tire attached to the car to measure actual speed.
These are used at more than 168mph.

I'm assuming there is a correlation between the need for special
construction in automobile tires and those on a "bicycle" designed
to go more than 3x the legal speed limit in New Jersey. If the
issue is strictly one relating to heat, there would be less time to
build the heat, but much less mass (meaning they'd hit the maximum
temperature quicker).

Car tires have significant mass and generate inter-ply and tread heat.
The ratings are not for speed but speed-load-temperature consideration
something that is not a problem for bicycles. That should be evident
from the low RR values that converted to energy don't amount to much
in the tire stress problem. So when you hear those SUV's and Pickups
fly by with a yayayayayaya... sound from a tire, it is heat
delamination. They got into this without realizing that highway
tractor-trailer units are the guys that leave entire treads on
roadsides, especially when weather (and road) is hot.

Jobst Brandt