Bottom bracket bearing

"Owen" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

My bottom bracket (splined and looks like a sealed unit) didn't make the
10,000K mark, so I need a new one.

I suppose bottom brackets are more or less the same, there can't be to
many manufacturers, or are there some better than others?

TIA

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Owen

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The bottom bracket on my Shogun Hybrid wore out in less than 7000 Km. The
direct replacement cost $30. My local bike shop replaced it with a $50 unit
and charged $20 for fitting. I have ridden for 13,000Km with no obvious
signs of wear. I recommend that you speak to your local bike shop for
advice.

John Dwyer.

"Owen" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

My bottom bracket (splined and looks like a sealed unit) didn't make

the

Quoted message said:

10,000K mark, so I need a new one.

I suppose bottom brackets are more or less the same, there can't be to
many manufacturers, or are there some better than others?

My square taper Acera cheap thang lasted from 2000-2003
with MANY k's on it. Regular commuting, mtb'ing, tri's and
longer weekend rides. It was getting crusty mid-2003 but I
was running it into the ground and used it until a month ago
when it was replaced with DeoreLX gear. I use the mtb a
lot less now so this setup should last ages. Anyway, I
recommend Shimano sealed BB's. Common and they work.
If it's for a road bike, I think 9spd DuraAce are NOT
sealed so I would stick with Ultegra even with the small
weight penalty (or lower spec, depends on the bike).

hippy

Owen said:

My bottom bracket (splined and looks like a sealed unit) didn't make the
10,000K mark, so I need a new one.
I suppose bottom brackets are more or less the same, there can't be to
many manufacturers, or are there some better than others?

Splined and sealed bottom brackets are not all the same. Shimano mak
several patterns and several manufacturers make them to the ISIS design
Cranks made for one design will fit no other and only with the ISI
design can you choose from more than one manufacturer. You need to tak
your cranks and the bottom bracket to your LBS to get a match unless yo
know the exact specification

10,000 kilometres is poor service from a bottom bracket. This would b
only about a year for a reasonably active cyclist

John Retchfor

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Owen said:

My bottom bracket (splined and looks like a sealed unit) didn't make the
10,000K mark, so I need a new one.
I suppose bottom brackets are more or less the same, there can't be to
many manufacturers, or are there some better than others?
TIA
--
Owen

As John said above, you need the correct type ie, ISIS or Shiman
Octalink? ISIS bottom brackets are notorious for failing early. M
Truvativ BB lasted 9 months. Although it was 9 months of hard off roa
riding. By comparison a 1989 Shimamo XT BB is still running fine in m
commuter bike

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Your're lucky. The bottom bracket to my Apollo LSR 1.0 gave way (only
slightly though) from about 1,600kms. Hopefully the replacements will
last longer. Cheap $400 bike, so can't complain so far.

Owen <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

My bottom bracket (splined and looks like a sealed unit) didn't make the
10,000K mark, so I need a new one.

I suppose bottom brackets are more or less the same, there can't be to
many manufacturers, or are there some better than others?

TIA

"Owen" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I suppose bottom brackets are more or less the same, there can't be to
many manufacturers, or are there some better than others?

My LBS Suggested that it is common practice to install low quality BB's in
new bikes because the buyer cannot tell the difference. If this is true you
may find that a LX equipped bike doesn't have an LX quality BB and may
result in this being the first component to require replacement.

Jeff Westwood

John Retchford said:

Owen said:

My bottom bracket (splined and looks like a sealed unit) didn't make the
10,000K mark, so I need a new one.
I suppose bottom brackets are more or less the same, there can't be to
many manufacturers, or are there some better than others?

<SNIP>

Quoted message said:

10,000 kilometres is poor service from a bottom bracket. This would be
only about a year for a reasonably active cyclist.

Quoted message said:

John Retchford

Quoted message said:

--

The BB in my road bike has been there for 20,000km and is
still going strong.

--
Nick

Jeff Westwood said:

My LBS Suggested that it is common practice to install low quality BB's in
new bikes because the buyer cannot tell the difference. If this is true
you may find that a LX equipped bike doesn't have an LX quality BB and may
result in this being the first component to require replacement.

I suspect that applied in my case. In the end

The bottom bracket wasn't a sealed unit, I was able to pull it apart
One ball race had been chewed up, the other about to go.
All this after 13 months/10,000k

This now raises a maintenance issue for me. The bike was new Jan 03.
Starting Nov, I had to regrease the front wheel, it had become caked. Next
I had to do the pedals, they were in the same state. Had to replace a
spoke on the back wheel, so I redid the bearings in that, looked like they
were about seize up, and now the bottom crank.

Looks like I had better plan on regreasing everything every 6months/5000K
which seems to be an awfully short time. Maybe should check the headset
now.

--
Owen

Just put in a Shimano one and forget about it for the rest of the life of
the bike.

--

"Owen" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Jeff Westwood said:

My LBS Suggested that it is common practice to install low quality BB's

in

Quoted message said:

Quoted message said:

new bikes because the buyer cannot tell the difference. If this is true
you may find that a LX equipped bike doesn't have an LX quality BB and

may

Quoted message said:

Quoted message said:

result in this being the first component to require replacement.

I suspect that applied in my case. In the end

The bottom bracket wasn't a sealed unit, I was able to pull it apart
One ball race had been chewed up, the other about to go.
All this after 13 months/10,000k

This now raises a maintenance issue for me. The bike was new Jan 03.
Starting Nov, I had to regrease the front wheel, it had become caked. Next
I had to do the pedals, they were in the same state. Had to replace a
spoke on the back wheel, so I redid the bearings in that, looked like they
were about seize up, and now the bottom crank.

Looks like I had better plan on regreasing everything every 6months/5000K
which seems to be an awfully short time. Maybe should check the headset
now.

--
Owen

Owen said:

My bottom bracket (splined and looks like a sealed unit) didn't make the
10,000K mark, so I need a new one.
I suppose bottom brackets are more or less the same, there can't be to
many manufacturers, or are there some better than others?
TIA
--
Owen

Owen:

I am quoting this from what I read on "roadbikereview" before. It seem
the Ultegra BB is the pick of the bunch for roadies. Some claim tha
they have replaced their OEM Dura-ace BB with it and are happier

I have 105 BB on my roadies (very good so far, but done only 2500 km o
the older), and will replace them with Ultegra when the time comes

Cheers, Amir

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