Shimano trigger gears problem.

[markharry66]

Had a gear cable go so went to local bike shop. I noticed gear cable they supplied was thicker than one already had . Fitted it now the left hand gear. Noticed that it clicks up but wont click back down under tension its the one that controls the front. Oiled it and it would click up and down but no movement of the chain.

Any ideas or is it time for a new one.

 

[Levo-Lon]

Change the cable,should fix it, and a little oil in the trigger can also free them up.
so new inner and some oil..

 

[roadrash]

I dont fully understand your post ...are you saying you changed the cable on the left hand shifter and now it doesnt work , if so did you change both inner and outer cable together ?

 

[Cubist]

1 sticky outer cable
2 not tensioned correctly

Front mechs can be pain the get right. Tension has to be just right as too much and the throw is wrong, too little and you get no movement. YouTube tutorials are your friend.

 

[earlestownflya]

your cables to thick for your outer..it's that simple there should have been little or no resistance when you threaded it

 

[earlestownflya]

also make sure you've threaded your cable correctly through the guide under your bottom bracket

 

[Karlt]

You sure it's a gear cable they've fitted and not a brake cable?

 

[Cubist]

Gear cable comes in two main thicknesses, generally, 1.2mm and 1.5mm. I happily interchange the two on all of my bikes without issue, but rule of thumb is to change outer at the same time. Unless the inner is corroded or frayed/snapped, it's the outer that causes the majority of the problems associated with shifting.

 

[markharry66]

Hi not fitted, fitted myself. Cable is slightly thicker and when you feed it through trigger stopped working.
Took off protective bottom part sprayed with oil. Started working but wont budget cable or chain I am hoping this due to thickness of gear cable.

 

[Cubist]

What trigger shifter is it?

 

[Smurfy]

Some cables should not be oiled. If they are good quality, the cable will have a PTFE coating, and the outer will have a PTFE liner. Oil can make the PTFE swell, and that stops the cable sliding easily. Such high quality cables will work very well without any lubrication whatsoever.