jumping shimano !!!

ed said:

I have recently upgraded to shimano dura ace/ultegra mix which is
brilliant, however I do have a slight problem with my chain slipping
when on the 53 11. bearing in mind that everything is brand new, so
it's obviously not a ware issue. Just to complete things even more,
my mavic sl wheels have a 12-25 dura ace which run fine, no jumping at
all. I have no idea what the problem is !!! Anybody which has any idea
would be greatly appreciated.

Is the limit screw too tight? Barrel adjuster too tight?

ed explained on 10/04/2006 :

Quoted message said:

I have recently upgraded to shimano dura ace/ultegra mix which is
brilliant, however I do have a slight problem with my chain slipping
when on the 53 11. bearing in mind that everything is brand new, so
it's obviously not a ware issue. Just to complete things even more,
my mavic sl wheels have a 12-25 dura ace which run fine, no jumping at
all. I have no idea what the problem is !!! Anybody which has any idea
would be greatly appreciated.

Are you using the correct lockring? It could be that the chain is being
restricted from engaging fully onto the teeth of the 11T sprocket
because it's contacting the lockring if not.

--
Simon
www.simondaw.freeserve.co.uk

ed said:

I have recently upgraded to shimano dura ace/ultegra mix which is
brilliant, however I do have a slight problem with my chain slipping
when on the 53 11. bearing in mind that everything is brand new, so
it's obviously not a ware issue. Just to complete things even more,
my mavic sl wheels have a 12-25 dura ace which run fine, no jumping at
all. I have no idea what the problem is !!! Anybody which has any idea
would be greatly appreciated.

Perhaps your chain is too long, have you got the mech adjusted properly.

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

Quoted message said:

I have recently upgraded to shimano dura ace/ultegra mix which is
brilliant, however I do have a slight problem with my chain slipping
when on the 53 11. bearing in mind that everything is brand new, so
it's obviously not a ware issue. Just to complete things even more,
my mavic sl wheels have a 12-25 dura ace which run fine, no jumping at
all. I have no idea what the problem is !!! Anybody which has any idea
would be greatly appreciated.

It's just God's way of punishing you for using far too big a gear.... ;-)

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

Quoted message said:

ed said:

I have recently upgraded to shimano dura ace/ultegra mix which is
brilliant, however I do have a slight problem with my chain slipping
when on the 53 11. bearing in mind that everything is brand new, so
it's obviously not a ware issue. Just to complete things even more,
my mavic sl wheels have a 12-25 dura ace which run fine, no jumping at
all. I have no idea what the problem is !!! Anybody which has any idea
would be greatly appreciated.

Perhaps your chain is too long, have you got the mech adjusted properly.

may be a stiff link in the chain.

cheers
Jon_H