Stretched chain problem

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

Quoted message said:

I had to change the cranks and bottom bracket bearings.
Replaced with a more recent chainwheel + cranks and new bottom bracket.
All fine but when putting foot down hard the chain slips on the
chainwheel, chain is stretched presumably, and only lodges properly
on the chainwheel in middle covering section and tends to ride
over remaining teeth to a certain extent. I don't fancy replacing chain
and rear derailleur cog block If i used a hand grind-wheel to grind the
chainwheel slots between the teeth more V rather than U shape would that
cure the problem
for a few more years ?

Unlikely.
You will effectively be keeping the same number of teeth on a reduced
diameter chainwheel. Reduced diameter = reduced circumference = reduced
tooth pitch,

Pete

in message <[email hidden]>, N Cook ([email hidden]'😉

Quoted message said:

I had to change the cranks and bottom bracket bearings.
Replaced with a more recent chainwheel + cranks and new bottom
bracket. All fine but when putting foot down hard the chain slips on
the chainwheel, chain is stretched presumably, and only lodges
properly on the chainwheel in middle covering section and tends to
ride over remaining teeth to a certain extent. I don't fancy replacing
chain and rear derailleur cog block If i used a hand grind-wheel to
grind the chainwheel slots between the teeth more V rather than U
shape would that cure the problem
for a few more years ?

No, it won't work and won't help at all because as you come in on radius
the spacing gets closer not further apart. You'll end up with a wrecked
chainwheel as well as a wrecked chain and a wrecked cassette.

You really have no choice but to change the lot, and the lesson is don't
let your chain get worn out - replace early, and save yourself a lot of
grief and money. Chains don't last 'years', even if well cared for.

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/
Just as defying the law of gravity through building aircraft requires
careful design and a lot of effort, so too does defying laws of
economics. It seems to be a deeply ingrained aspect of humanity to
forever strive to improve things, so unquestioning acceptance of a
free market system seems to me to be unnatural. ;; Charles Bryant

Simon Brooke said:

You really have no choice but to change the lot, and the lesson is don't
let your chain get worn out - replace early, and save yourself a lot of
grief and money. Chains don't last 'years', even if well cared for.

I'm on my 3rd chain this year on my main bike. In fact I'm just about to
dump it in a jar of white spirit and give it the Sheldon Shake to get it
nice and clean for the weekend.

--
Dave...

Every time I see an adult on a bicycle, I no longer despair for the
future of the human race. - H. G. Wells

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

Quoted message said:

Chains don't last 'years', even if well cared for.

For some values of "well cared for" - think chaincase...

in message <[email hidden]>, jtaylor

(') said:

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

Quoted message said:

Chains don't last 'years', even if well cared for.

For some values of "well cared for" - think chaincase...

Yup, a totally enclosed chain is a different kettle of fish altogether,
which is why I think gboxx (or something similar) and a chain running
inside the rear suspension swing arm is the way to go with mountain
bikes.

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/

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