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

--
Owen

---------------------------------------------------------------------
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

Quoted post said:

Originally posted by Owen
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 make several patterns and several manufacturers make them to the ISIS design. Cranks made for one design will fit no other and only with the ISIS design can you choose from more than one manufacturer. You need to take your cranks and the bottom bracket to your LBS to get a match unless you know the exact specification.

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

John Retchford

Quoted post said:

Originally posted by Owen
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 Shimano Octalink?
ISIS bottom brackets are notorious for failing early. My Truvativ BB lasted 9 months. Although it was 9 months of hard off road riding. By comparison a 1989 Shimamo XT BB is still running fine in my commuter bike.

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

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

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

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:

I am quoting this from what I read on "roadbikereview" before. It seems the Ultegra BB is the pick of the bunch for roadies. Some claim that 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 on the older), and will replace them with Ultegra when the time comes.

Cheers,
Amir.

Quoted post said:

Originally posted by Owen
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