Sora 7spd Triple

[bantae]

Does anyone know how many clicks the left brifter on the Sora 7spd
shifter set has. My 105 has 4 clicks, and works just fine on my
triple, but this Sora only has 3 and will not go to all 3 chainrings.
I can get it to work just fine on small /middle or middle/big but not
all 3. This is a brand new set of Sora triple brifters, and I am using
a Sora 9 spd FD with 7spd cranks.

Thanks,

bantae

[Mike Jacoubowsky]

> Does anyone know how many clicks the left brifter on the Sora 7spd
> shifter set has. My 105 has 4 clicks, and works just fine on my
> triple, but this Sora only has 3 and will not go to all 3 chainrings.
> I can get it to work just fine on small /middle or middle/big but not
> all 3. This is a brand new set of Sora triple brifters, and I am using
> a Sora 9 spd FD with 7spd cranks.
>
> Thanks,
>
> bantae

Your problem is most-likely 9-speed front derailleur, which has a narrower
cage than the 7-speed. That, combined with no trim function on the 7-speed
STI lever, will definitely give you some grief.

--Mike Jacoubowsky
Chain Reaction Bicycles
www.ChainReaction.com
Redwood City & Los Altos, CA USA

[bantae]

On Mar 29, 7:02 pm, "Mike Jacoubowsky" <Mi...@ChainReaction.com>
wrote:
> > Does anyone know how many clicks the left brifter on the Sora 7spd
> > shifter set has. My 105 has 4 clicks, and works just fine on my
> > triple, but this Sora only has 3 and will not go to all 3 chainrings.
> > I can get it to work just fine on small /middle or middle/big but not
> > all 3. This is a brand new set of Sora triple brifters, and I am using
> > a Sora 9 spd FD with 7spd cranks.
>
> > Thanks,
>
> > bantae
>
> Your problem is most-likely 9-speed front derailleur, which has a narrower
> cage than the 7-speed. That, combined with no trim function on the 7-speed
> STI lever, will definitely give you some grief.
>
> --Mike Jacoubowsky
> Chain Reaction Bicycleswww.ChainReaction.com
> Redwood City & Los Altos, CA USA

Thanks for the input. Would an 8spd work, or do I need to find a 7
spd?

[Mike Jacoubowsky]

>> Your problem is most-likely 9-speed front derailleur, which has a
>> narrower
>> cage than the 7-speed. That, combined with no trim function on the
>> 7-speed
>> STI lever, will definitely give you some grief.
>>
>> --Mike Jacoubowsky
>> Chain Reaction Bicycleswww.ChainReaction.com
>> Redwood City & Los Altos, CA USA
>
> Thanks for the input. Would an 8spd work, or do I need to find a 7
> spd?

I don't honestly know if there's much difference between the 7 & 8-speed
front derailleurs. The chain doesn't get narrower until you get to the
9-speed, and that might also be where the ability to "trim" the derailleur
comes in as well.

There are also issues if you're using chainring configurations (sizes) that
aren't what the derailleur is expecting. For example, the inner plate on a
derailleur made for a 39t middle chainring is shaped differently than one
made for a 42tooth.

--Mike Jacoubowsky
Chain Reaction Bicycles
www.ChainReaction.com
Redwood City & Los Altos, CA USA


"bantae" <bantae@aol.com> wrote in message
news:2b2133b1-8167-489f-bcd7-12cff2c9f8c5@a70g2000hsh.googlegroups.com...
> On Mar 29, 7:02 pm, "Mike Jacoubowsky" <Mi...@ChainReaction.com>
> wrote:
>> > Does anyone know how many clicks the left brifter on the Sora 7spd
>> > shifter set has. My 105 has 4 clicks, and works just fine on my
>> > triple, but this Sora only has 3 and will not go to all 3 chainrings.
>> > I can get it to work just fine on small /middle or middle/big but not
>> > all 3. This is a brand new set of Sora triple brifters, and I am using
>> > a Sora 9 spd FD with 7spd cranks.
>>
>> > Thanks,
>>
>> > bantae
>>
>> Your problem is most-likely 9-speed front derailleur, which has a
>> narrower
>> cage than the 7-speed. That, combined with no trim function on the
>> 7-speed
>> STI lever, will definitely give you some grief.
>>
>> --Mike Jacoubowsky
>> Chain Reaction Bicycleswww.ChainReaction.com
>> Redwood City & Los Altos, CA USA
>
> Thanks for the input. Would an 8spd work, or do I need to find a 7
> spd?