ISIS BB Short Life?

[Coatsey]

Just fitted my 3rd ISIS BB to a Coiler in 18 months. Both old BB's (sealed
units) started grinding and died after about 200 miles of mostly XC use (not
DH stress).

Any recommendations how to maintain them, or why they might fail so soon?
It's getting expensive!

Thanks,

J.

 

[Mark Hickey]

"Coatsey" <[email protected]> wrote:

>Just fitted my 3rd ISIS BB to a Coiler in 18 months. Both old BB's (sealed
>units) started grinding and died after about 200 miles of mostly XC use (not
>DH stress).

How is DH more stressful than XC (where you're actually turning the
cranks occasionally)? ;-) Either way, the bearings in the BB are
rated at many, many times the actual load they'll ever see - the only
thing that ever kills a BB is poor lubrication.

>Any recommendations how to maintain them, or why they might fail so soon?
>It's getting expensive!

Not much you can do for most cartridge BBs - what brand are you
buying?

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $795 ti frame

 

[Scott Gordo]

Coatsey wrote:
> Just fitted my 3rd ISIS BB to a Coiler in 18 months. Both old BB's (sealed
> units) started grinding and died after about 200 miles of mostly XC use (not
> DH stress).
>
> Any recommendations how to maintain them, or why they might fail so soon?
> It's getting expensive!
>
> Thanks,
>
> J.

200 miles is definitely short, but ISIS being a crappy design as far as
longevity goes is a common complaint and, as far as I know, there's no
real maintenance to be done on them. I've had similar problems with
Shimano Octalink BBs. Use them, grind the bearings into paste, chuck
them into the landfill.

See if warrantee coverage applies. I was able to score a replacement
FSA bb that way. Even though I haven't any experience with them, may
want to investigate external bearings setups too. "Buy new stuff" is
hardly a satisfying answer, but ISIS and DODO have identical cadence
for a reason.

Scott

 

[Booker C. Bense]

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In article <[email protected]>,
Coatsey <[email protected]> wrote:
>Just fitted my 3rd ISIS BB to a Coiler in 18 months. Both old BB's (sealed
>units) started grinding and died after about 200 miles of mostly XC use (not
>DH stress).
>
>Any recommendations how to maintain them, or why they might fail so soon?
>It's getting expensive!
>

_ I don't know if this will help or not, but there are some BB's
that come with an extra bearing on the drive side. Even for ISIS
BB's 200 miles seems like an incredibly short lifetime...

_ Booker C. Bense



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[Tim]

On 2006-05-01, Coatsey <[email protected]> wrote:
> Just fitted my 3rd ISIS BB to a Coiler in 18 months. Both old BB's (sealed
> units) started grinding and died after about 200 miles of mostly XC use (not
> DH stress).
>
> Any recommendations how to maintain them, or why they might fail so soon?
> It's getting expensive!
>
> Thanks,
>
> J.
>
>

Who made them? The Truvativ ISIS BB which came bundled with the
cranks was only good for around 400 miles before becoming horribly
rough. The FSA that's replaced it has done 600 miles so far and still
seems smooth.

Longest lived BBs I've had have been Shimano squre taper ones-
the UN72 in the old rigid has covered about 5k miles and is still smooth
and free of play. Isn't progress great!
--
Tim.

[email protected]

 

[[email protected]]

200 mile is really cheap. OE last me about a year and the longest was a
L 24 that went 4.5 years. And all the ones I installed go on forever.
Keep the water out and I use lots of grease. I push the BB down in the
grease container pull it out and install it. I just repacked a L 24
thats about 10 years.