Tiagra 4700 Front Shifter

[Arthur60]

Hi All,

I recently purchased a bike online. It's fitted with 10 speed Tiagra groupset. I've been setting up the shifters to my liking but have an issue with the front chainset shifter trim operation.

The front derailleur is a Tiagra with 2 chain ring Tiagra crank. The shifters seems to have the required clicks in it's operation. But after following the Shimano installation guide I can't seem to achieve any real movement on the derailleur on the small ring, even though the shifters clicks over.

Anyone have any thoughts?

Cheers,

Arthur

 

[raleighnut]

Hi All,

I recently purchased a bike online. It's fitted with 10 speed Tiagra groupset. I've been setting up the shifters to my liking but have an issue with the front chainset shifter trim operation.

The front derailleur is a Tiagra with 2 chain ring Tiagra crank. The shifters seems to have the required clicks in it's operation. But after following the Shimano installation guide I can't seem to achieve any real movement on the derailleur on the small ring, even though the shifters clicks over.

Anyone have any thoughts?

Cheers,

Arthur

Stops ? ...........................Will the mech move inward by hand or is it hard against the inner stop.

 

[Arthur60]

Hi. Thanks for the reply. Much seems to have free movement. Limit screws are set. I wonder if it's cable tension.

The installation guide says after setting the inner limit screw, pulled the cable and tighten the clamp. Then shift up to the large chain ring but on the trim setting, adjust cable tension so chain is clear of inner plate of derailleur, then shift out to set outer limit screw.

Then large ring trim works well, but then inner ring movement is an issue.

 

[fritz katzenjammer]

this works for me most of the time… ( I build new bikes for Trek )

assure the derailleur is aligned square to the chainwheels.

assure the lower edge of the derailleur is the correct clearance to the chainrings. when viewed from the side the lower edge of the cage should clear the teeth of the large chainring by about 2-3mm. ( 2x system, not 3x ) This is with the derailleur positioned over the smaller chainring. Almost every bike I see has this set too high brand new, right out of the box.

Put the rear derailleur in the largest cog position and the front derailleur over the small ring.

disconnect the cable to the front derailleur. Assure the inline cable adjusters are screwed all the way in.

adjust the stop till the front derailleur just clears the chain. 0-0.5mm clearance on the inside of the chain. Look from overhead.

assure the front shifter is in its lowest position.

attach the cable, pull it tight, you want as little play as possible.

assure the high limit is backed out a bit.

shift the rear derailleur to the smallest cog and the front to the large chainring. Highest position on the shifter, not high trim.

adjust the cable tension to get about 0.5-1.0mm between the outside of the chain and the inside of the derailleur. Looking from the rear is best, along the chain.

set the upper limit screw to just contact.

This pretty much works all of the time assuming everything is in good order to start with. You need a good smooth running front cable, if it’s old or kinked replace it.

It’s odd but I’ve found that with a good clean shifting set up with nothing dragging in any gear the derailleur doesn’t always have movement in both trim positions. At that point, if it works be happy with it.

 

[Arthur60]

Thanks. Basically this is howc I set it up using the Shimano installation guide.

One think I thought was to back off completely the large chain ring set screw, increase the tension on the inline adjuster and see if that changes anything.

It's a new bike so will be messaging the sellers, but was hoping to resolve it myself, but also good to refresh my knowledge on this area.

My other bike, older with a triple set on the front works without problem.

 

[raleighnut]

One think I thought was to back off completely the large chain ring set screw, increase the tension on the inline adjuster and see if that changes anything.

It won't, other than maybe over shooting the big ring and dropping the chain

 

[Arthur60]

Thanks. I was just looking to see if any change in cable tension will initiate noticeable movement in the derailleur on the low position.

 

[raleighnut]

Thanks. I was just looking to see if any change in cable tension will initiate noticeable movement in the derailleur on the low position.

Not if the mech is hard against the 'low stop'' the screw may only need a quarter/half turn though as they are quite precise

 

[Punkawallah]

Thinking out of the box, if it is a new bike (out of the box), is there any packaging interfering with movement of the mech, lever or cable?

 

[Paulus]

Thanks. I was just looking to see if any change in cable tension will initiate noticeable movement in the derailleur on the low position.

If you shift onto the smallest ring then unclamp the cable from the FD does the mech move over on it's own? If it does, the cable was too tight, if it doesn't, adjust the lower limit screw and watch to see if the mech moves over.

 

[C R]

The trimming clicks don't cause much movement, so it may be moving, but you don't notice it.

 

[Arthur60]

Thanks all. The derailleur moves freely. The cable is internly routed. When I set the tension, the shifter (small lever) had been operated a number of times to ensure there were no existing selections in the shifter itself. With the cable not clamped and the chain on the small front ring, but largest rear cog, I set the inner limit screw to ensure no chain rub, allowing a millimeter for any variation in the chain run. I then pulled the cable and clamp. Then shifted up to largest chain ring, saying on largest rear, but in the trim position. Then adjusted cable tension with the inline adjuster to ensure chain is not rubbing inner plate on front derailleur. Then shifted out to max position for front derailleur and with chain on smallest cog on cassette, set outer limit screw. Trim on outer ring works fine, but really you can't see any movement on front derailleur when dropping onto smallest front ring.
A question is when moving to first click on chainset shifter for trim position, should you have to move the lever further passed click position to achieve the trim position, or hearing the click should be enough? Difficult to explain. Thanks for everyone's help.

 

[Arthur60]

Sorry to post further on this........

Trying to look at this again. My other road bike has a triple chainset at the front and the trim works really well. This new bike had a double tiagra on the front and a 10 speed tiagra cassette on the back.

Even with the trim set correctly, and I know cross chaining is not recommended, but should I be able to run on smallest ring on the front and smallest on the cassette, and largest on the front and largest on the back with no real chain rub on the front derailleur?

Thanks

 

[Shearwater Missile]

Sorry to post further on this........

Trying to look at this again. My other road bike has a triple chainset at the front and the trim works really well. This new bike had a double tiagra on the front and a 10 speed tiagra cassette on the back.

Even with the trim set correctly, and I know cross chaining is not recommended, but should I be able to run on smallest ring on the front and smallest on the cassette, and largest on the front and largest on the back with no real chain rub on the front derailleur?

Thanks

You will probably get a bit of chain rub in small small. I have the Tiagra as well, double that is. I always leave two sprockets clear for error. That is if I am in the small chainring I`d never go to a larger sprocket than the third largest. Once the stops are set leave alone. It then just comes down to tension on the cable in my experience. Hope you get it sorted.

 

[Arthur60]

Thanks.

Think it is the tension, trying balance some kind of movement when down on the small chian ring, without over tensioning so that it causes issues when trying to trim on the largest chain ring.

As said when on the smallest chain ring, to get any noticeable movement on the front derailleur you do have to push passed the first click on the shifter.......my old bike with sora shifters each click with the trim you get a noticeable amount of movement.