I just noticed this

I just noticed this and am wondering if its a problem.
I'm standing next to my bike, pick the rear wheel off
the ground, and hold it there by the saddle. With my
other hand, in a big gear, I spin the wheel as fast as
I can with my other hand. After I stop pedaling, the
wheel is spinning rapidly. It is also pulsing up and
down about 2 times a second. Any idea what could
cause this? I don't notice anything when riding. The
rim, a Velomax Tempest, is within 2mm of lateral
and vertical true, and the hub feels very smooth.
Could it be the freehub?

Wrote:
I just noticed this and am wondering if its a problem.
I'm standing next to my bike, pick the rear wheel off
the ground, and hold it there by the saddle. With my
other hand, in a big gear, I spin the wheel as fast as
I can with my other hand. After I stop pedaling, the
wheel is spinning rapidly. It is also pulsing up and
down about 2 times a second. Any idea what could
cause this? I don't notice anything when riding. The
rim, a Velomax Tempest, is within 2mm of lateral
and vertical true, and the hub feels very smooth.
Could it be the freehub?
I've never owned a bike that that did not happen with. Probably due to
balance problems (maybe the weight of the valve?) but never been really
bothered by it - it happens at speeds I don't pedal at.

DB


--
Duracell Bunny

wrote in message
ups.com...
I just noticed this and am wondering if its a problem.
I'm standing next to my bike, pick the rear wheel off
the ground, and hold it there by the saddle. With my
other hand, in a big gear, I spin the wheel as fast as
I can with my other hand. After I stop pedaling, the
wheel is spinning rapidly. It is also pulsing up and
down about 2 times a second. Any idea what could
cause this? I don't notice anything when riding. The
rim, a Velomax Tempest, is within 2mm of lateral
and vertical true, and the hub feels very smooth.
Could it be the freehub?


Most bike wheels are not perfectly balanced. The valve (and the hole drilled
to accommodate it) cause it to be just a bit off. it's a small enough amount
tht you don't notice while riding, but if you spin it ap really fast while
golding it up with one hand then you will notice it.

wrote:
I just noticed this and am wondering if its a problem.
I'm standing next to my bike, pick the rear wheel off
the ground, and hold it there by the saddle. With my
other hand, in a big gear, I spin the wheel as fast as
I can with my other hand. After I stop pedaling, the
wheel is spinning rapidly. It is also pulsing up and
down about 2 times a second. Any idea what could
cause this? I don't notice anything when riding. The
rim, a Velomax Tempest, is within 2mm of lateral
and vertical true, and the hub feels very smooth.
Could it be the freehub?

The wheel is unbalanced. Do you have a reflector on the wheel? If so,
either remove it or balance it with another reflector on the opposite
side of the hub.

Travis

Travis wrote:
wrote:
I just noticed this and am wondering if its a problem.
I'm standing next to my bike, pick the rear wheel off
the ground, and hold it there by the saddle. With my
other hand, in a big gear, I spin the wheel as fast as
I can with my other hand. After I stop pedaling, the
wheel is spinning rapidly. It is also pulsing up and
down about 2 times a second. Any idea what could
cause this? I don't notice anything when riding. The
rim, a Velomax Tempest, is within 2mm of lateral
and vertical true, and the hub feels very smooth.
Could it be the freehub?

The wheel is unbalanced. Do you have a reflector on the wheel? If so,
either remove it or balance it with another reflector on the opposite
side of the hub.

Travis



http://www.roadcycling.net/showthread.php?t=221575

28-02-2005

"Friday" wrote in message
...
Travis wrote:
wrote:
I just noticed this and am wondering if its a problem.
I'm standing next to my bike, pick the rear wheel off
the ground, and hold it there by the saddle. With my
other hand, in a big gear, I spin the wheel as fast as
I can with my other hand. After I stop pedaling, the
wheel is spinning rapidly. It is also pulsing up and
down about 2 times a second. Any idea what could
cause this? I don't notice anything when riding. The
rim, a Velomax Tempest, is within 2mm of lateral
and vertical true, and the hub feels very smooth.
Could it be the freehub?

The wheel is unbalanced. Do you have a reflector on the wheel? If so,
either remove it or balance it with another reflector on the opposite
side of the hub.

Travis



http://www.roadcycling.net/showthread.php?t=221575

28-02-2005

Anyone else get a feeling of déjà vu ?

wrote:
I just noticed this and am wondering if its a problem.
I'm standing next to my bike, pick the rear wheel off
the ground, and hold it there by the saddle. With my
other hand, in a big gear, I spin the wheel as fast as
I can with my other hand. After I stop pedaling, the
wheel is spinning rapidly. It is also pulsing up and
down about 2 times a second. Any idea what could
cause this? I don't notice anything when riding. The
rim, a Velomax Tempest, is within 2mm of lateral
and vertical true, and the hub feels very smooth.
Could it be the freehub?

It's buggered, and it's probably ruined the whole bike due to
vibration.

I'll give you $5 for the bike, and that's just because I care about
your safety. I'll see that it's properly disposed of.


BTH

Boostland wrote:

http://www.roadcycling.net/showthread.php?t=221575

28-02-2005

Anyone else get a feeling of déjà vu ?


Hmmm... nice cut and paste job!


--
Bean

Remove "yourfinger" before replying

"Bean Long" wrote in message
...
Boostland wrote:

http://www.roadcycling.net/showthread.php?t=221575

28-02-2005

Anyone else get a feeling of déjà vu ?

Hmmm... nice cut and paste job!



Not quite. The word "behaviour" is missing from the first sentence. The
mystery deepens...


--
www.ozcableguy.com
www.oztechnologies.com

OzCableguy wrote:
"Bean Long" wrote in message
...
Boostland wrote:

http://www.roadcycling.net/showthread.php?t=221575

28-02-2005

Anyone else get a feeling of déjà vu ?

Hmmm... nice cut and paste job!



Not quite. The word "behaviour" is missing from the first sentence. The
mystery deepens...

It's Bratton, ignore it. *always* check the profile/history of a 'new'
poster before following up.