bad rear dear adjustment => trashed cassettes???

[foothillbiker]

All,

I have been going through cassettes faster than I think I ought to, and
suspect the rear der adjustment might be to blame.

Data:
- campy record 10 circa 2004 stuff / Ti-Steel cassettes
- cassette 1: dead after 2,700 miles
- cassette 2: dead after 2,395 miles
- cassette 3: dead after 1,150 miles
- chains generally discarded every 1,000 miles
- all cassettes started w/ new chain
- it's always the 19 or 21 cog that goes bad
- "bad" means hopelessly skipping

Some of the riding has been in the rain, but not much (I have a rain
bike for that).

Could there be some kind of alignment issue? I have another bike w/ the
same setup for which cassettes generally last north of 5,000 miles.

TIA.

REgards,
Chas.

 

[Wasatch5k]

Sounds like a stretched chain to me, time to replace.

nc

 

[Wasatch5k]

oops, guess I should read all of it before I reply.

 

[Neil Brooks]

"foothillbiker" <[email protected]> wrote:

>All,
>
>I have been going through cassettes faster than I think I ought to, and
>suspect the rear der adjustment might be to blame.
>
>Data:
>- campy record 10 circa 2004 stuff / Ti-Steel cassettes
>- cassette 1: dead after 2,700 miles
>- cassette 2: dead after 2,395 miles
>- cassette 3: dead after 1,150 miles
>- chains generally discarded every 1,000 miles
>- all cassettes started w/ new chain
>- it's always the 19 or 21 cog that goes bad
>- "bad" means hopelessly skipping
>
>Some of the riding has been in the rain, but not much (I have a rain
>bike for that).
>
>Could there be some kind of alignment issue? I have another bike w/ the
>same setup for which cassettes generally last north of 5,000 miles.
>
>TIA.
>
>REgards,
>Chas.

Silly question here, Chas, but . . .

Are the 19t and 21t cogs the ones that are titanium? IOW: are you
seeing a difference in life between the two metals? ISTR that the
largest *four* are Ti on these cassettes....

If so, is the *tiny* weight savings of using Ti in this application
really worth the reduced service life?

 

[foothillbiker]

Neil,

yes, those cogs are TI.

I hear you on the weight/durability issue, but I'm thinking I should be
able to get the same mileage out of cassettes on Bike-A as I do on
Bike-B -- iow, Bike- B has the same setup, and cassettes last at least
2x as long...

REgards,
Chas.

 

[serg]

i would look at the chain line on both frames. is one straighter than
the other?
put the chain on the big front and the 19 or 21 rear and see what that
looks like. is it the same on both?

 

[Neil Brooks]

"foothillbiker" <[email protected]> wrote:

>Neil,
>
>yes, those cogs are TI.
>
>I hear you on the weight/durability issue, but I'm thinking I should be
>able to get the same mileage out of cassettes on Bike-A as I do on
>Bike-B -- iow, Bike- B has the same setup, and cassettes last at least
>2x as long...
>
>REgards,
>Chas.

Sorry. I made an assumption that the cassettes weren't /that/
identical between the two bikes.

Any other differences between the two? Do you spend more time in the
bigger cogs (more climbing) on Bike A then Bike B?

If you believe Branford Bike . . .

http://www.branfordbike.com/cassette/cog16.html

.. . . then your B bike is far closer (70% of) to expected service life
(7k miles). Branford recommends the Le Tour lube (why??).

I agree with Serg about checking the chainline.

Sheldon Brown's page . . .

http://www.sheldonbrown.com/chainline/

 

[Sid]

I would definitely suspect a frame and/or derailleur hanger out of
alignment. Although, I would also expect shifting problems to occur almost
immediately upon installing a new cassette instead of after 1000 miles or
so.

Sid

"foothillbiker" <[email protected]> wrote in message
news:[email protected]...
> All,
>
> I have been going through cassettes faster than I think I ought to, and
> suspect the rear der adjustment might be to blame.
>
> Data:
> - campy record 10 circa 2004 stuff / Ti-Steel cassettes
> - cassette 1: dead after 2,700 miles
> - cassette 2: dead after 2,395 miles
> - cassette 3: dead after 1,150 miles
> - chains generally discarded every 1,000 miles
> - all cassettes started w/ new chain
> - it's always the 19 or 21 cog that goes bad
> - "bad" means hopelessly skipping
>
> Some of the riding has been in the rain, but not much (I have a rain
> bike for that).
>
> Could there be some kind of alignment issue? I have another bike w/ the
> same setup for which cassettes generally last north of 5,000 miles.
>
> TIA.
>
> REgards,
> Chas.
>

 

[A Muzi]

foothillbiker wrote:

> yes, those cogs are TI.
> I hear you on the weight/durability issue, but I'm thinking I should be
> able to get the same mileage out of cassettes on Bike-A as I do on
> Bike-B -- iow, Bike- B has the same setup, and cassettes last at least
> 2x as long...

Ti on both bikes?

Titanium wears much faster. File or saw a bit of Ti some
time. It cuts more like aluminum than like steel.

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

 

[Mark D]

Hi Chas, Others here have made good observations, and I'd like to
comment a bit. On my Paramount 50th build, which was all 2004 Record, I
opted to NOT buy the Record Ti/Steel Cassette, and instead used the
Chorus All Steel 10-sp 13/26.

It was on the advice, and discussion of others here last year (Thank you
folks) that the Ti Cogs would not be as resistant to wear as the all
Steel Cassette, and I figured for the the substantial extra price vs the
weight issue, the few extra grams of weight wasn't going to put me in
the contending for being a favorite pick at the Tour De France. lol

I didn't cut corners too much with the chain though, I went with a
Wipperman Connex 10-sp Stainless Chain, and I've been quite happy with
this chain's performance all in all.

My Paramount 50th Anniversary weighs in at exactly 20lbs, (58cm) and
this is not bad at all for an all steel Columbus SLX frame from 1989.

I probably could've knocked off an additional 1 lb, or so by utilizing
the Ti/Steel Cassette, Record Carbon Seatpost, Carbon Record Bottle
Cage, Clipless pedals vs Record Cage Pedals-Clips, wheels lighter than
Mavic Open Pros, a lighter set of bars vs Vintage Cinelli's and a
lighter saddle vs the Selle Fausto Coppi Saddle I use, but doubtful if
I'd feel any difference at the pedals. Mark D.