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SRAM Red BB Disassembly



 
 
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  #11  
Old May 26th 08, 01:50 PM posted to rec.bicycles.tech
Derk
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Posts: 185
Default SRAM Red BB Disassembly

damyth wrote:
Just to be clear, I'm no fan of ceramic myself,

In an article in TOUR about resistance in the drivetrain, the author stated
that ceramic bearings really bring you next to nothing and are a waste of
money. It was also said that ceramic bearings belong where other bearings
fail, because of extreme heat or very high RPM.

Derk


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  #12  
Old May 26th 08, 05:29 PM posted to rec.bicycles.tech
Hank
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Posts: 887
Default SRAM Red BB Disassembly

On May 26, 5:41 am, "Qui si parla Campagnolo-www.vecchios.com"
wrote:

BTW-I think the Centaur design for 2007 was a huge mistake.


You mean the downgrade of the hubs and shifters in exchange for a few
carbon bits? I like how the 2007 Centaur RD, with its carbon outer
link is actually HEAVIER than the prior model, because it has the
solid top knuckle, instead of the 2-beam one. And how the Centaur
carbon UT crank has the cheap stamped "Exa-Drive" chainrings of Veloce
and below, while the aluminum crank still has the good forged "Ultra-
Drive" rings.

That's why my Guerciotti is equipped with old Centaur, except for the
aluminum UT crank. I wouldn't turn down a set of the skeleton brakes,
but the old ones were $35 on closeout. An excellent, no-nonsense group
with all the best features of the top groups (especially the
adjustable bearings on the hubs), just made of cheap 'n' cheerful
alloy instead of carbon.
  #13  
Old May 26th 08, 06:55 PM posted to rec.bicycles.tech
A Muzi
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Posts: 4,551
Default SRAM Red BB Disassembly

damyth wrote:
Just to be clear, I'm no fan of ceramic myself,


Derk wrote:
In an article in TOUR about resistance in the drivetrain, the author stated
that ceramic bearings really bring you next to nothing and are a waste of
money. It was also said that ceramic bearings belong where other bearings
fail, because of extreme heat or very high RPM.


Steel balls almost never shatter when overly tightened.
--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971
** Posted from http://www.teranews.com **
  #14  
Old May 26th 08, 08:29 PM posted to rec.bicycles.tech
Ryan Cousineau
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Posts: 4,044
Default SRAM Red BB Disassembly

In article
,
Hank wrote:

On May 26, 5:41 am, "Qui si parla Campagnolo-www.vecchios.com"
wrote:

BTW-I think the Centaur design for 2007 was a huge mistake.


You mean the downgrade of the hubs and shifters in exchange for a few
carbon bits? I like how the 2007 Centaur RD, with its carbon outer
link is actually HEAVIER than the prior model, because it has the
solid top knuckle, instead of the 2-beam one. And how the Centaur
carbon UT crank has the cheap stamped "Exa-Drive" chainrings of Veloce
and below, while the aluminum crank still has the good forged "Ultra-
Drive" rings.

That's why my Guerciotti is equipped with old Centaur, except for the
aluminum UT crank. I wouldn't turn down a set of the skeleton brakes,
but the old ones were $35 on closeout. An excellent, no-nonsense group
with all the best features of the top groups (especially the
adjustable bearings on the hubs), just made of cheap 'n' cheerful
alloy instead of carbon.


IT WAS ALL DOWNHILL AFTER RECORD-9 Ti! I HAVE THE LAST, BEST GROUPO EVER
MADE!

No, seriously, I feel the pain of those who like last year's model the
best, but it's funny. On one hand, I really like brifters (and I prefer
Campy's design to Shimano's, though not enough to not have STI-bikes),
and on the other hand, I ride a commuter bike with friction shifting
across 5 rear cogs.

The dirty secret is how simple and pleasant that bike is. With 5
widely-spaced cogs, friction shifting is no big deal. It doesn't have
nice ramps, pins, missing teeth, or hyper-shaped cogs, so sometimes the
shifting is a little slow, especially since I don't lube the derailers
much and thus they sometimes are dirty and balky about the small cog and
ring.

Oh well. They just work, and they cause no fuss.

Like I said, I like brifters a lot, but only when I'm racing. For actual
riding around town, The old two-DTs-and-no-fuss has much to recommend it.

I'm also experimenting with an Alfine 8 hub, and it's...really cool! I'm
not sure it's cool enough to take over from Sora as the commuter
geartrain of choice, but it's fun.

--
Ryan Cousineau http://www.wiredcola.com/
"In other newsgroups, they killfile trolls."
"In rec.bicycles.racing, we coach them."
  #15  
Old May 27th 08, 01:43 PM posted to rec.bicycles.tech
Qui si parla Campagnolo-www.vecchios.com Qui si parla Campagnolo-www.vecchios.com is offline
Banned
 
First recorded activity by CycleBanter: Jul 2006
Posts: 933
Default SRAM Red BB Disassembly

On May 26, 10:29*am, Hank wrote:
On May 26, 5:41 am, "Qui si parla Campagnolo-www.vecchios.com"

wrote:
BTW-I think the Centaur design for 2007 was a huge mistake.


You mean the downgrade of the hubs and shifters in exchange for a few
carbon bits? I like how the 2007 Centaur RD, with its carbon outer
link is actually HEAVIER than the prior model, because it has the
solid top knuckle, instead of the 2-beam one. And how the Centaur
carbon UT crank has the cheap stamped "Exa-Drive" chainrings of Veloce
and below, while the aluminum crank still has the good forged "Ultra-
Drive" rings.


Yep, the innards of the shifters are ala Xenon. They took Veloce bits,
added carbon and called it Centaur.

That's why my Guerciotti is equipped with old Centaur, except for the
aluminum UT crank. I wouldn't turn down a set of the skeleton brakes,
but the old ones were $35 on closeout. An excellent, no-nonsense group
with all the best features of the top groups (especially the
adjustable bearings on the hubs), just made of cheap 'n' cheerful
alloy instead of carbon.


We still can get most of the 2006 Centaur stuff altho prices for ERGO
and hubs have skyrocketed.

  #16  
Old May 27th 08, 01:44 PM posted to rec.bicycles.tech
Qui si parla Campagnolo-www.vecchios.com Qui si parla Campagnolo-www.vecchios.com is offline
Banned
 
First recorded activity by CycleBanter: Jul 2006
Posts: 933
Default SRAM Red BB Disassembly

On May 26, 1:29*pm, Ryan Cousineau wrote:
In article
,



*Hank wrote:
On May 26, 5:41 am, "Qui si parla Campagnolo-www.vecchios.com"
wrote:


BTW-I think the Centaur design for 2007 was a huge mistake.


You mean the downgrade of the hubs and shifters in exchange for a few
carbon bits? I like how the 2007 Centaur RD, with its carbon outer
link is actually HEAVIER than the prior model, because it has the
solid top knuckle, instead of the 2-beam one. And how the Centaur
carbon UT crank has the cheap stamped "Exa-Drive" chainrings of Veloce
and below, while the aluminum crank still has the good forged "Ultra-
Drive" rings.


That's why my Guerciotti is equipped with old Centaur, except for the
aluminum UT crank. I wouldn't turn down a set of the skeleton brakes,
but the old ones were $35 on closeout. An excellent, no-nonsense group
with all the best features of the top groups (especially the
adjustable bearings on the hubs), just made of cheap 'n' cheerful
alloy instead of carbon.


IT WAS ALL DOWNHILL AFTER RECORD-9 Ti! I HAVE THE LAST, BEST GROUPO EVER
MADE!


Nope I have the best made, 1989 C-Record/Delta and also 1987 Suoper
Record.

No, seriously, I feel the pain of those who like last year's model the
best, but it's funny. On one hand, I really like brifters (and I prefer
Campy's design to Shimano's, though not enough to not have STI-bikes),
and on the other hand, I ride a commuter bike with friction shifting
across 5 rear cogs.

The dirty secret is how simple and pleasant that bike is. With 5
widely-spaced cogs, friction shifting is no big deal. It doesn't have
nice ramps, pins, missing teeth, or hyper-shaped cogs, so sometimes the
shifting is a little slow, especially since I don't lube the derailers
much and thus they sometimes are dirty and balky about the small cog and
ring.

Oh well. They just work, and they cause no fuss.

Like I said, I like brifters a lot, but only when I'm racing. For actual
riding around town, The old two-DTs-and-no-fuss has much to recommend it.

I'm also experimenting with an Alfine 8 hub, and it's...really cool! I'm
not sure it's cool enough to take over from Sora as the commuter
geartrain of choice, but it's fun.

--
Ryan Cousineau /
"In other newsgroups, they killfile trolls."
"In rec.bicycles.racing, we coach them."


  #17  
Old May 27th 08, 01:56 PM posted to rec.bicycles.tech
Qui si parla Campagnolo-www.vecchios.com Qui si parla Campagnolo-www.vecchios.com is offline
Banned
 
First recorded activity by CycleBanter: Jul 2006
Posts: 933
Default SRAM Red BB Disassembly

On May 26, 6:50*am, Derk wrote:
damyth wrote:
Just to be clear, I'm no fan of ceramic myself,


In an article in TOUR about resistance in the drivetrain, the author stated
that ceramic bearings really bring you next to nothing and are a waste of
money. It was also said that ceramic bearings belong where other bearings
fail, because of extreme heat or very high RPM.

Derk


'Worth' is a big word and the money spent on ceramics, by the 'why
train when you buy speed' crowd, may seem worth it to them. Placebo is
another big word.
As I have said more than once, significant performance gains come from
4 things, all starting with 'F' and none of them involve the bike
-bike Fit
-Fat, lackthereof on you(Lemond called it being 'artificially light,
Lance found out too)
-Fitness-being fiy
-Finese-riding/racing smart
 




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