FYI chain question results

dreaded said:

very helpful and said i could try the new chain without a new ring but it
wouldn't help.

Certainly worth a try.

Quoted message said:

why a new chain would slip off even more than the old one.

Clearly the single symptom of a worn-out ring.

she told me

Quoted message said:

that since the old gears were so worn they were used to the old chain and
that i need a new cassette and front middle ring. i looked closely at the
old cassette and it was obvious which were my favorite gears but it didnt
look too worn to me.

It might be OK if it wasn't used too much with the old chain.

Quoted message said:

have an old benotto w/campy stuff and nothing ever wore out on that bike
so i see im naive about the new stuff. it seems the new 9-speed gears are
so thin that a new chain every 1000mi is recommended. that old 7-sp
benotto mustve had 10K miles on it's gears and chain!

Campy equipment is not magical. What happened with that old bike was that
all the parts, chain, cassette (or freewheel) and chainrings were worn.
Replacing the chain would have put you exactly where you are now.

I don't think a mileage number is the right way to gauge chain
replacement. Better to measure chain wear. Look across the top run of
chain, and count 12 full links. Get a ruler, and measure from say the end
of one pin to the one 12 links away. It should be exactly 12 inches on a
new chain. At 12 1/16" I replace my chain. Usually that is 2000-3000
miles, depending. If you wait until the distance is 12 1/8", you should
replace the cassette too, and hope you don't have to replace the
chainrings. Usually, they are more than the cassette.

--

David L. Johnson

__o | Accept risk. Accept responsibility. Put a lawyer out of
_`\(,_ | business.
(_)/ (_) |

"David L. Johnson" <[email hidden]> wrote in message
news:[email hidden]...
SNIP > I don't think a mileage number is the right way to gauge chain

Quoted message said:

replacement. Better to measure chain wear. Look across the top run of
chain, and count 12 full links. Get a ruler, and measure from say the end
of one pin to the one 12 links away. It should be exactly 12 inches on a
new chain. At 12 1/16" I replace my chain. Usually that is 2000-3000
miles, depending. If you wait until the distance is 12 1/8", you should
replace the cassette too, and hope you don't have to replace the
chainrings. Usually, they are more than the cassette.

--

David L. Johnson

__o | Accept risk. Accept responsibility. Put a lawyer out of
_`\(,_ | business.
(_)/ (_) |

thanks...actually while at the shop we measured with their ruler and the
chain was at the "replace" mark which looked like about 1/8 away. looking at
the cassette it doesnt look too bad, the front middle ring was much
worse-which makes sense since im always on that ring when going uphill and i
use the rear cassette gears more evenly. the bike rides fine now with a new
middle front and new chain.
-alan

In article <[email hidden]>, [email hidden] says...

Quoted message said:

thanks...actually while at the shop we measured with their ruler and the
chain was at the "replace" mark which looked like about 1/8 away.

1/16 is the replace mark. 1/8 is the already done damage mark.

Quoted message said:

looking at the cassette it doesnt look too bad,

On HG cogs, that are shaped to easy shifts, it is difficult to eye ball
wear.

Quoted message said:

the front middle ring was much worse-which makes sense since im always on that
ring when going uphill and i use the rear cassette gears more evenly. the bike
rides fine now with a new middle front and new chain.

Just remember than changing a $20 chain will save you money in the long
run.
-------------
Alex

Quoted message said:

we both noticed that the middle ring had very pointy
teeth

Which ring - the one behind the rabbit?