Fit new outer when replacing gear cable ?

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swod1
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Fit new outer when replacing gear cable ?

Postby swod1 » Sun Jan 26, 2014 22:20 pm

Do you guys fit a new outer pieces when fitting a new gear cable ?

I've put a new cable on rear derailleur and it easily fed through to the back but now wondering if to replace the whole cable outers.

I've got an issue where once going through the gears and taking out cable slack and doing up the pinch bolt, the cable gets too tight going up to the larger sprockets making hard to press the shifter but gets loose going to the smaller gears.

Reading guides ,the cable once on the rear largest sprocket gear should be untensioned a bit loose and once on the smallest gear say 9 for example, the tension on the cable be tight but not too tight.

Is this correct ?

Any tips, I've done it many times before but this time something is a miss and has been doing my head in as it's messing up the indexing.

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cooldad
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Re: Fit new outer when replacing gear cable ?

Postby cooldad » Sun Jan 26, 2014 22:27 pm

Back to front I think unless you have a rapid rise rear mech, and I always replace both.
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cooldad
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Re: Fit new outer when replacing gear cable ?

Postby cooldad » Sun Jan 26, 2014 22:28 pm

Read Parktools
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mattv
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Re: Fit new outer when replacing gear cable ?

Postby mattv » Mon Jan 27, 2014 07:20 am

Ensure the hanger is straight and the chain is not worn. Strange shifting characteristics can be due to both of these if cable adjustment doesn't fix it.

swod1
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Re: Fit new outer when replacing gear cable ?

Postby swod1 » Mon Jan 27, 2014 08:03 am

The rear mech is a deore 9 speed, top/normal spring.

It shifts gears but I just wondered why the cable is getting rather tight when shifting up the cassette.

Also is it better to adjust cable tension on the actual rear mech or shifter, I have both options ?

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cooldad
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Re: Fit new outer when replacing gear cable ?

Postby cooldad » Mon Jan 27, 2014 08:27 am

Makes no difference where you adjust it, and the cable should tighten, that's what moves the mech.
But sounds like you are too tight to start with.

Loosen everything, read Parktools and start again.
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swod1
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Re: Fit new outer when replacing gear cable ?

Postby swod1 » Mon Jan 27, 2014 10:13 am

cooldad wrote:Makes no difference where you adjust it, and the cable should tighten, that's what moves the mech.
But sounds like you are too tight to start with.

Loosen everything, read Parktools and start again.


I've been following the park tools guide anyway for the indexing guide.

I understand so the cable tension on the outer most gear should be relaxed and when on the Inner most gear be tensioned as the derailleur moves across towards the wheel ?

It doesn't help there isn't a groove on the pinch bolt for the cable to route through like there is on the xt mechs.

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cooldad
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Re: Fit new outer when replacing gear cable ?

Postby cooldad » Mon Jan 27, 2014 10:25 am

Not sure what you mean by 'relaxed'. Set limit screws, attach cable, fine tune with barrel adjuster.
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Giraffoto
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Re: Fit new outer when replacing gear cable ?

Postby Giraffoto » Tue Jan 28, 2014 14:37 pm

swod1 wrote:Do you guys fit a new outer pieces when fitting a new gear cable ?


Yes, I usually do. it's pretty cheap stuff.
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The Rookie
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Re: Fit new outer when replacing gear cable ?

Postby The Rookie » Wed Jan 29, 2014 12:49 pm

Sounds like you are running into a badly adjusted high stop, or the pivots on the mech are gunged up.

swod1
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Re: Fit new outer when replacing gear cable ?

Postby swod1 » Wed Jan 29, 2014 13:04 pm

The Rookie wrote:Sounds like you are running into a badly adjusted high stop, or the pivots on the mech are gunged up.


Never had a problem with the mech before, until now when i fitted a new cable myself instead of using the local bike shop.

I will have a proper look at it this weekend, the gears have worked fine before the new cable was put on.


swod1
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Re: Fit new outer when replacing gear cable ?

Postby swod1 » Thu Jan 30, 2014 08:51 am

The Rookie wrote:Your not testing this dry shifting without spinning the cranks are you?


Nope, just clicking up and down the gears while turning the pedals to check the indexing and noticing how tight the cable was when getting on to the largest rear gear on the cassette.

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Re: Fit new outer when replacing gear cable ?

Postby mini_death » Sat Feb 01, 2014 19:15 pm

The shifter tightens the cable to pull the mech into the low gears (largest sprockets) on a standard rear mech.


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