Chinese Carbon Wheelset
 

On Tuesday I was trying out my LeMond on a 40 mile 3500 feet of climbing ride. On the return trip I hit a bump and it made a horrible sound. It sounded like the rear carbon rim had broken. But the when seemed to roll fine. When I got home I knocked on the rim and it rattled in a couple of spots so I assumed it was delaminating.

I finally figured out that it wasn't the wheels. When I hit a hard bump the sear post would move and this made that noise. Perhaps also because the headset is new it has a little slack that needs to be taken up now that it has been ridden. This isn't unusual for aluminum headsets where all of the components have to seat together.

Anyway, I rode it again today but with a set of Campy aluminum wheels. In one point it again made that noise and it appears that it was the seat post moving. Think that I'll throw away that Campy Carbon seatpost and install an aluminum one.

Chinese Carbon Wheelset
 

On 23/8/19 8:13 am, Tom Kunich wrote:
On Tuesday I was trying out my LeMond on a 40 mile 3500 feet of
climbing ride. On the return trip I hit a bump and it made a horrible
sound. It sounded like the rear carbon rim had broken. But the when
seemed to roll fine. When I got home I knocked on the rim and it
rattled in a couple of spots so I assumed it was delaminating.

I finally figured out that it wasn't the wheels. When I hit a hard
bump the sear post would move and this made that noise. Perhaps also
because the headset is new it has a little slack that needs to be
taken up now that it has been ridden. This isn't unusual for aluminum
headsets where all of the components have to seat together.

Anyway, I rode it again today but with a set of Campy aluminum
wheels. In one point it again made that noise and it appears that it
was the seat post moving. Think that I'll throw away that Campy
Carbon seatpost and install an aluminum one.



Not that I have used a carbon post, stem, bars or steerer, but I hear
that it is usual to apply some friction goo to clamps so that the clamp
grips without squashing the carbon tube or stripping a thread.

At a pinch I hear tooth paste can be useful.

--
JS

Chinese Carbon Wheelset
 

On 8/23/2019 5:45 PM, James wrote:
On 23/8/19 8:13 am, Tom Kunich wrote:
On Tuesday I was trying out my LeMond on a 40 mile 3500 feet of
climbing ride. On the return trip I hit a bump and it made a horrible
sound. It sounded like the rear carbon rim had broken. But the when
seemed to roll fine. When I got home I knocked on the rim and it
rattled in a couple of spots so I assumed it was delaminating.

I finally figured out that it wasn't the wheels. When I hit a hard
bump the sear post would move and this made that noise. Perhaps also
because the headset is new it has a little slack that needs to be
taken up now that it has been ridden. This isn't unusual for aluminum
headsets where all of the components have to seat together.

Anyway, I rode it again today but with a set of Campy aluminum
wheels. In one point it again made that noise and it appears that it
was the seat post moving. Think that I'll throw away that Campy
Carbon seatpost and install an aluminum one.

Not that I have used a carbon post, stem, bars or steerer, but I hear
that it is usual to apply some friction goo to clamps so that the clamp
grips without squashing the carbon tube or stripping a thread.

At a pinch I hear tooth paste can be useful.

The "friction goo" is usually called "carbon paste."

And conversely, a fan of ultra-light bike touring might wonder: Can one
brush one's teeth with carbon paste?

--
- Frank Krygowski

Chinese Carbon Wheelset
 

On Friday, August 23, 2019 at 6:23:04 PM UTC-7, Frank Krygowski wrote:
On 8/23/2019 5:45 PM, James wrote:
On 23/8/19 8:13 am, Tom Kunich wrote:
On Tuesday I was trying out my LeMond on a 40 mile 3500 feet of
climbing ride. On the return trip I hit a bump and it made a horrible
sound. It sounded like the rear carbon rim had broken. But the when
seemed to roll fine. When I got home I knocked on the rim and it
rattled in a couple of spots so I assumed it was delaminating.

I finally figured out that it wasn't the wheels. When I hit a hard
bump the sear post would move and this made that noise. Perhaps also
because the headset is new it has a little slack that needs to be
taken up now that it has been ridden. This isn't unusual for aluminum
headsets where all of the components have to seat together.

Anyway, I rode it again today but with a set of Campy aluminum
wheels. In one point it again made that noise and it appears that it
was the seat post moving. Think that I'll throw away that Campy
Carbon seatpost and install an aluminum one.

Not that I have used a carbon post, stem, bars or steerer, but I hear
that it is usual to apply some friction goo to clamps so that the clamp
grips without squashing the carbon tube or stripping a thread.

At a pinch I hear tooth paste can be useful.

The "friction goo" is usually called "carbon paste."

And conversely, a fan of ultra-light bike touring might wonder: Can one
brush one's teeth with carbon paste?

No, but one could use toothpaste as fiber paste. You could also lube your chain with mouthwash, after flossing each link.

-- Jay Beattie.

Chinese Carbon Wheelset
 

On Fri, 23 Aug 2019 21:22:45 -0400, Frank Krygowski
wrote:

On 8/23/2019 5:45 PM, James wrote:
On 23/8/19 8:13 am, Tom Kunich wrote:
On Tuesday I was trying out my LeMond on a 40 mile 3500 feet of
climbing ride. On the return trip I hit a bump and it made a horrible
sound. It sounded like the rear carbon rim had broken. But the when
seemed to roll fine. When I got home I knocked on the rim and it
rattled in a couple of spots so I assumed it was delaminating.

I finally figured out that it wasn't the wheels. When I hit a hard
bump the sear post would move and this made that noise. Perhaps also
because the headset is new it has a little slack that needs to be
taken up now that it has been ridden. This isn't unusual for aluminum
headsets where all of the components have to seat together.

Anyway, I rode it again today but with a set of Campy aluminum
wheels. In one point it again made that noise and it appears that it
was the seat post moving. Think that I'll throw away that Campy
Carbon seatpost and install an aluminum one.

Not that I have used a carbon post, stem, bars or steerer, but I hear
that it is usual to apply some friction goo to clamps so that the clamp
grips without squashing the carbon tube or stripping a thread.

At a pinch I hear tooth paste can be useful.

The "friction goo" is usually called "carbon paste."

And conversely, a fan of ultra-light bike touring might wonder: Can one
brush one's teeth with carbon paste?

Well... at $12.49 a 4 oz tube it does seem a bit expensive.
--
cheers,

John B.

Chinese Carbon Wheelset
 

On 25/8/19 5:18 am, Tom Kunich wrote:


I have never used "carbon paste" for anything and can't imagine why.


Imagine harder.

--
JS

Chinese Carbon Wheelset
 

On Saturday, August 24, 2019 at 2:18:05 PM UTC-7, James wrote:
On 25/8/19 5:18 am, Tom Kunich wrote:


I have never used "carbon paste" for anything and can't imagine why.


Imagine harder.

--
JS

Why? I have had CF frames for a long time. I've never even SEEN "carbon paste" let alone used it for anything.

Chinese Carbon Wheelset
 

On Saturday, August 24, 2019 at 11:36:31 PM UTC+2, Tom Kunich wrote:
On Saturday, August 24, 2019 at 2:18:05 PM UTC-7, James wrote:
On 25/8/19 5:18 am, Tom Kunich wrote:


I have never used "carbon paste" for anything and can't imagine why.


Imagine harder.

--
JS

Why? I have had CF frames for a long time. I've never even SEEN "carbon paste" let alone used it for anything.

Really? Google it, it has been around for ages.

Lou

Chinese Carbon Wheelset
 

On Saturday, August 24, 2019 at 2:36:31 PM UTC-7, Tom Kunich wrote:
On Saturday, August 24, 2019 at 2:18:05 PM UTC-7, James wrote:
On 25/8/19 5:18 am, Tom Kunich wrote:


I have never used "carbon paste" for anything and can't imagine why.


Imagine harder.

--
JS

Why? I have had CF frames for a long time. I've never even SEEN "carbon paste" let alone used it for anything.

Usually called fiber paste or fiber grip. http://www.finishlineusa.com/product...ts/fiber-grip- It reminds me of Goop hand cleaner with Borax -- a high viscosity gritty substances that prevents slipping between carbon parts, specifically seat posts. If you have not had slipping, good for you -- but it maybe the reason your CF post is causing so much racket.. OTOH, you could just have a noisy post. At 5nm on the clamp bolt, some carbon posts will slip in a carbon frame without fiber paste. The post on my old Roubaix would.

-- Jay Beattie.

Chinese Carbon Wheelset
 

On 25/8/19 7:36 am, Tom Kunich wrote:
On Saturday, August 24, 2019 at 2:18:05 PM UTC-7, James wrote:
On 25/8/19 5:18 am, Tom Kunich wrote:


I have never used "carbon paste" for anything and can't imagine why.


Imagine harder.

--
JS

Why? I have had CF frames for a long time. I've never even SEEN "carbon paste" let alone used it for anything.



Because you complained about a CF seat post slipping. You wrote:

"In one point it again made that noise and it appears that it was the
seat post moving. Think that I'll throw away that Campy Carbon seatpost
and install an aluminum one."


--
JS