Durability of ceramic bearings?

Mike Jacoubowsky

We've been seeing increasing evidence of ceramic bearings not being all that
durable. Just wondering if others are experiencing this, or if it's not an
issue because ceramic bearings are only going onto "race" bikes & wheels
that don't get too many miles etc.

Cracked cases (in full-ceramic, not hybrid) and generally crunchy operation
after not all that many miles seems relatively common. To me, for $200,
something ought to last for awhile.

So what are others seeing? Thanks-

--Mike Jacoubowsky
Chain Reaction Bicycles
www.ChainReaction.com
Redwood City & Los Altos, CA USA

MagillaGorilla

Mike Jacoubowsky wrote:

> We've been seeing increasing evidence of ceramic bearings not being all that
> durable. Just wondering if others are experiencing this, or if it's not an
> issue because ceramic bearings are only going onto "race" bikes & wheels
> that don't get too many miles etc.
>
> Cracked cases (in full-ceramic, not hybrid) and generally crunchy operation
> after not all that many miles seems relatively common. To me, for $200,
> something ought to last for awhile.
>
> So what are others seeing? Thanks-
>
> --Mike Jacoubowsky
> Chain Reaction Bicycles
> www.ChainReaction.com
> Redwood City & Los Altos, CA USA


Why would you pay $200 for ceramic bearings in a bottom bracket/wheels?
Regular steel bearings were fine.

Magilla

Mike Jacoubowsky

> Why would you pay $200 for ceramic bearings in a bottom bracket/wheels?
> Regular steel bearings were fine.
>
> Magilla

Pretty much in complete agreement with you on that one. There's a
theoretical advantage for the bottom bracket (because ceramic bearings don't
deform under pressure), but virtually no reason at all to use them in a
wheel.

--Mike Jacoubowsky
Chain Reaction Bicycles
www.ChainReaction.com
Redwood City & Los Altos, CA USA


"MagillaGorilla" <magilla@zoo.com> wrote in message
news:N82dnV5iz6tceqDVnZ2dnUVZ_jWdnZ2d@ptd.net...
> Mike Jacoubowsky wrote:
>
>> We've been seeing increasing evidence of ceramic bearings not being all
>> that durable. Just wondering if others are experiencing this, or if it's
>> not an issue because ceramic bearings are only going onto "race" bikes &
>> wheels that don't get too many miles etc.
>>
>> Cracked cases (in full-ceramic, not hybrid) and generally crunchy
>> operation after not all that many miles seems relatively common. To me,
>> for $200, something ought to last for awhile.
>>
>> So what are others seeing? Thanks-
>>
>> --Mike Jacoubowsky
>> Chain Reaction Bicycles
>> www.ChainReaction.com
>> Redwood City & Los Altos, CA USA
>
>
> Why would you pay $200 for ceramic bearings in a bottom bracket/wheels?
> Regular steel bearings were fine.
>
> Magilla

William Asher

"Mike Jacoubowsky" <MikeJ@ChainReaction.com> wrote in
news:31p%j.2594$jI5.672@flpi148.ffdc.sbc.com:

>> Why would you pay $200 for ceramic bearings in a bottom
>> bracket/wheels? Regular steel bearings were fine.
>>
>> Magilla
>
> Pretty much in complete agreement with you on that one. There's a
> theoretical advantage for the bottom bracket (because ceramic bearings
> don't deform under pressure), but virtually no reason at all to use
> them in a wheel.
>

Don't they color coordinate with Assos clothing better than steel?

--
Bill Asher

joseph.santaniello@gmail.com

On May 29, 9:08*am, William Asher <gcn...@yahoo.com> wrote:
> "Mike Jacoubowsky" <Mi...@ChainReaction.com> wrote innews:31p%j.2594$jI5.672@flpi148.ffdc.sbc.com:
>
> >> Why would you pay $200 for ceramic bearings in a bottom
> >> bracket/wheels? Regular steel bearings were fine.
>
> >> Magilla
>
> > Pretty much in complete agreement with you on that one. There's a
> > theoretical advantage for the bottom bracket (because ceramic bearings
> > don't deform under pressure), but virtually no reason at all to use
> > them in a wheel.
>
> Don't they color coordinate with Assos clothing better than steel?
>
> --
> Bill Asher

They could just sell the sticker for $200, then nobody has to get
their hands dirty.

Joseph

MagillaGorilla

Mike Jacoubowsky wrote:

>>Why would you pay $200 for ceramic bearings in a bottom bracket/wheels?
>>Regular steel bearings were fine.
>>
>>Magilla
>
>
> Pretty much in complete agreement with you on that one. There's a
> theoretical advantage for the bottom bracket (because ceramic bearings don't
> deform under pressure), but virtually no reason at all to use them in a
> wheel.
>
> --Mike Jacoubowsky
> Chain Reaction Bicycles
> www.ChainReaction.com
> Redwood City & Los Altos, CA USA
>


I honestly don't think ceramic bearings are harder or smoother than
steel. That grittiness you feel is those bearings breaking down under load.

Magilla

William Asher

joseph.santaniello@gmail.com wrote:

> On May 29, 9:08*am, William Asher <gcn...@yahoo.com> wrote:
>> "Mike Jacoubowsky" <Mi...@ChainReaction.com> wrote
>> innews:31p%j.2594$jI5.6
> 72@flpi148.ffdc.sbc.com:
>>
>> >> Why would you pay $200 for ceramic bearings in a bottom
>> >> bracket/wheels? Regular steel bearings were fine.
>>
>> >> Magilla
>>
>> > Pretty much in complete agreement with you on that one. There's a
>> > theoretical advantage for the bottom bracket (because ceramic
>> > bearings don't deform under pressure), but virtually no reason at
>> > all to use them in a wheel.
>>
>> Don't they color coordinate with Assos clothing better than steel?
>>
>
> They could just sell the sticker for $200, then nobody has to get
> their hands dirty.

Could I make money by custom installing the sticker for $350?

--
Bill Asher

thefronny@gmail.com

On May 29, 11:04 am, William Asher <gcn...@yahoo.com> wrote:
> joseph.santanie...@gmail.com wrote:
> > On May 29, 9:08 am, William Asher <gcn...@yahoo.com> wrote:
> >> "Mike Jacoubowsky" <Mi...@ChainReaction.com> wrote
> >> innews:31p%j.2594$jI5.6
> > 7...@flpi148.ffdc.sbc.com:
>
> >> >> Why would you pay $200 for ceramic bearings in a bottom
> >> >> bracket/wheels? Regular steel bearings were fine.
>
> >> >> Magilla
>
> >> > Pretty much in complete agreement with you on that one. There's a
> >> > theoretical advantage for the bottom bracket (because ceramic
> >> > bearings don't deform under pressure), but virtually no reason at
> >> > all to use them in a wheel.
>
> >> Don't they color coordinate with Assos clothing better than steel?
>
> > They could just sell the sticker for $200, then nobody has to get
> > their hands dirty.
>
> Could I make money by custom installing the sticker for $350?
>
> --
> Bill Asher

You could if you were the only one who had the "special" adhesive.

tf

Scott

On May 28, 5:16*pm, MagillaGorilla <magi...@zoo.com> wrote:
> Mike Jacoubowsky wrote:
> > We've been seeing increasing evidence of ceramic bearings not being all that
> > durable. Just wondering if others are experiencing this, or if it's not an
> > issue because ceramic bearings are only going onto "race" bikes & wheels
> > that don't get too many miles etc.
>
> > Cracked cases (in full-ceramic, not hybrid) and generally crunchy operation
> > after not all that many miles seems relatively common. To me, for $200,
> > something ought to last for awhile.
>
> > So what are others seeing? *Thanks-
>
> > --Mike Jacoubowsky
> > Chain Reaction Bicycles
> >www.ChainReaction.com
> > Redwood City & Los Altos, CA USA
>
> Why would you pay $200 for ceramic bearings in a bottom bracket/wheels?
> * *Regular steel bearings were fine.
>
> Magilla- Hide quoted text -
>
> - Show quoted text -

Yes, but ceramic bearings are laterally stiff and vertically compliant.

billb

On May 30, 12:20*am, Scott <hendricks_sc...@hotmail.com> wrote:
> On May 28, 5:16*pm, MagillaGorilla <magi...@zoo.com> wrote:
>
>
>
>
>
> > Mike Jacoubowsky wrote:
> > > We've been seeing increasing evidence of ceramic bearings not being all that
> > > durable. Just wondering if others are experiencing this, or if it's not an
> > > issue because ceramic bearings are only going onto "race" bikes & wheels
> > > that don't get too many miles etc.
>
> > > Cracked cases (in full-ceramic, not hybrid) and generally crunchy operation
> > > after not all that many miles seems relatively common. To me, for $200,
> > > something ought to last for awhile.
>
> > > So what are others seeing? *Thanks-
>
> > > --Mike Jacoubowsky
> > > Chain Reaction Bicycles
> > >www.ChainReaction.com
> > > Redwood City & Los Altos, CA USA
>
> > Why would you pay $200 for ceramic bearings in a bottom bracket/wheels?
> > * *Regular steel bearings were fine.
>
> > Magilla- Hide quoted text -
>
> > - Show quoted text -
>
> Yes, but ceramic bearings are laterally stiff and vertically compliant.- Hide quoted text -
>
> - Show quoted text -

Sounds like a failing male member.
Best,
Bill Black

MagillaGorilla

Mike Jacoubowsky wrote:

> We've been seeing increasing evidence of ceramic bearings not being all that
> durable. Just wondering if others are experiencing this, or if it's not an
> issue because ceramic bearings are only going onto "race" bikes & wheels
> that don't get too many miles etc.
>
> Cracked cases (in full-ceramic, not hybrid) and generally crunchy operation
> after not all that many miles seems relatively common. To me, for $200,
> something ought to last for awhile.
>
> So what are others seeing? Thanks-
>
> --Mike Jacoubowsky
> Chain Reaction Bicycles
> www.ChainReaction.com
> Redwood City & Los Altos, CA USA


One of the reason you've been taken in by ceramic bearings is because
you've also been taken in by riders who claim they weren't doping.

You're gullible and you don't realize that people in this sport will lie
to make money - whether it's cyclists or companies.

Stop swallowing.


Take care,

Magilla

Qui si parla Campagnolo-www.vecchios.com

On May 28, 11:00*am, "Mike Jacoubowsky" <Mi...@ChainReaction.com>
wrote:
> We've been seeing increasing evidence of ceramic bearings not being all that
> durable. Just wondering if others are experiencing this, or if it's not an
> issue because ceramic bearings are only going onto "race" bikes & wheels
> that don't get too many miles etc.
>
> Cracked cases (in full-ceramic, not hybrid) and generally crunchy operation
> after not all that many miles seems relatively common. To me, for $200,
> something ought to last for awhile.
>
> So what are others seeing? *Thanks-
>
> --Mike Jacoubowsky
> Chain Reaction Bicycleswww.ChainReaction.com
> Redwood City & Los Altos, CA USA

Agree Mike. We sell few(like 2 or 3 pulleys) but have installed more
than a couple, brought in by customers. First, the 'action' of these
don't seem any smoother, better than 'normal' BBs, pulleys and hubs
after installed. In the hand test reveal the same, they don't feel any
different. After little use, they seem to get gritty quickly, perhaps
by poor/reduced sealing to try to make them 'feel' smoother when used.
What is amazing is the $ some people have spent for these and the hype
presented by some online cycling websites about what an amazing
upgrade these 'are'. Real world doesn't seem to match the 'news' of
these.

Howard Kveck

In article <1cfd849d-be50-4af9-bf12-e9ca4ea1bbbd@y22g2000prd.googlegroups.com>,
"Qui si parla Campagnolo-www.vecchios.com" <peter@vecchios.com> wrote:

> On May 28, 11:00*am, "Mike Jacoubowsky" <Mi...@ChainReaction.com>
> wrote:
> > We've been seeing increasing evidence of ceramic bearings not being all that
> > durable. Just wondering if others are experiencing this, or if it's not an
> > issue because ceramic bearings are only going onto "race" bikes & wheels
> > that don't get too many miles etc.
> >
> > Cracked cases (in full-ceramic, not hybrid) and generally crunchy operation
> > after not all that many miles seems relatively common. To me, for $200,
> > something ought to last for awhile.
> >
> > So what are others seeing? *Thanks-
> >
> > --Mike Jacoubowsky
> > Chain Reaction Bicycleswww.ChainReaction.com
> > Redwood City & Los Altos, CA USA
>
> Agree Mike. We sell few(like 2 or 3 pulleys) but have installed more
> than a couple, brought in by customers. First, the 'action' of these
> don't seem any smoother, better than 'normal' BBs, pulleys and hubs
> after installed. In the hand test reveal the same, they don't feel any
> different. After little use, they seem to get gritty quickly, perhaps
> by poor/reduced sealing to try to make them 'feel' smoother when used.
> What is amazing is the $ some people have spent for these and the hype
> presented by some online cycling websites about what an amazing
> upgrade these 'are'. Real world doesn't seem to match the 'news' of
> these.

I wonder about how they'd really work as a derailleur pulley for another reason:
the upper one (at least on Campy) has some side-to-side float built into it. The
ceramic bearing ones don't. I think you'd have to have the spacing on the gears and
the derailleur adjustment perfect with the ceramic pulleys or any (alleged) gains
from the nifty bearings would be nullified by the chain scrub.

--
tanx,
Howard

Whatever happened to
Leon Trotsky?
He got an icepick
That made his ears burn.

remove YOUR SHOES to reply, ok?