Re: Shimano chain question

[jim beam]

Neal wrote:
> I just got a used very low mileage bike with a Shimano Ultegra 10 drive
> train. I noticed the chain is connected opposite of what Shimano
> recommends. The connecting pin is on the trailing part of the link
> instead of the forward position. Is this anything to be concerned
> about?

if you believe shimano's own literature, yes! download their tech
manual on the chain and it'll tell you the joint strength difference iirc.


> I have a Wipperman connecting link from my Campagnolo 10 setup
> (not the ultra narrow chain). Can this be used with Shimano? This is
> my first experience with Shimano after riding Campy equiped bikes since
> 1974.

[Laurence Darby]

jim beam wrote:

> Neal wrote:
> > I just got a used very low mileage bike with a Shimano Ultegra 10 drive
> > train. I noticed the chain is connected opposite of what Shimano
> > recommends. The connecting pin is on the trailing part of the link
> > instead of the forward position. Is this anything to be concerned
> > about?
>
> if you believe shimano's own literature, yes! download their tech
> manual on the chain and it'll tell you the joint strength difference iirc.
>
>

Hi,
Do you have a link? I was searching for this the other day but only
found the end user manual, which says to do it but nothing else.
I've tried to work out *why*, but I'm not sure if this is the right
reason. The forces on the leading pins are "ballanced": opposite forces
from the inner and outer plates, and from teeth (via the rollers) in the
same direction as the outer plates, but the forces on trailing pins are
unballanced, with the force from the teeth in the opposite direction
from the outer plates creating a lever effect (you'd probably want to
draw a diagram). And it's not cancelled out by the front chainring
because there are more teeth hence lower force per tooth.
Is that correct?

Laurence

[jim beam]

Laurence Darby wrote:
> jim beam wrote:
>
>> Neal wrote:
>>> I just got a used very low mileage bike with a Shimano Ultegra 10 drive
>>> train. I noticed the chain is connected opposite of what Shimano
>>> recommends. The connecting pin is on the trailing part of the link
>>> instead of the forward position. Is this anything to be concerned
>>> about?
>> if you believe shimano's own literature, yes! download their tech
>> manual on the chain and it'll tell you the joint strength difference iirc.
>>
>>
>
> Hi,
> Do you have a link? I was searching for this the other day but only
> found the end user manual, which says to do it but nothing else.
> I've tried to work out *why*, but I'm not sure if this is the right
> reason. The forces on the leading pins are "ballanced": opposite forces
> from the inner and outer plates, and from teeth (via the rollers) in the
> same direction as the outer plates, but the forces on trailing pins are
> unballanced, with the force from the teeth in the opposite direction
> from the outer plates creating a lever effect (you'd probably want to
> draw a diagram). And it's not cancelled out by the front chainring
> because there are more teeth hence lower force per tooth.
> Is that correct?
>
> Laurence
>
>
http://bike.shimano.com/media/techdocs/content/cycle/SI/SI_08V0C/SI_08V0C_13_v1_m56577569830612411.pdf