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Stuck on 105 triple front gear setup.....(8 posts)

Stuck on 105 triple front gear setup.....Tim Field
Jul 11, 2002 1:57 AM
I'm having a bit of trouble setting up my front gears.... hope someone can help. The main problem is the downshift, which when on the top ring drops all the way to the smallest ring (missing out the middle). Is this supposed to happen? I'm also having a bit of trouble getting both the smallest ring to go into the middle ring and then the middle ring to go into the top one. I usually get one right but this throws the other out (chain rubs agains derailier). Are there any tricks here?

Many Thanks , Tim
RU suremuncher
Jul 11, 2002 2:06 AM
that you have a triple shifter there? Are there 3 distinct click positions ?
RU sureTim Field
Jul 11, 2002 3:10 AM
It's a new bike and came set up with tripple (mech + chainset etc.) so I hope so! Is there any way to tell on the shifters?

Thanks, Tim
Nup, butmuncher
Jul 11, 2002 3:15 AM
your 4 click answer below means you have the right ones - with the position advice below you should get there.

You should find that there is a trim click both ways from large to middle though.
number of clicksweiwentg
Jul 11, 2002 2:35 AM
hope this helps. but it's one click only to go from the 52t to the 42t, and there's one trim position between the 30t and the 42t.
number of clicksTim Field
Jul 11, 2002 3:12 AM
Ah! I think there may be 4 clicks going up (if I remember rightly), maybe this is why my settings are wrong. I'm used to mountain bikes with 1 click per chainring. Still there's only one going down.
STI triples can be a pain to set up.Spoke Wrench
Jul 11, 2002 5:11 AM
1. Completely disconnect the shift cable. IMPORTANT
2. Make sure the front derailleur is positioned correctly on the seat tube. IMPORTANT
3. Shift the rear into the biggest cog and adjust the low gear limit screw.
4. Make sure the front shifter is in the lowest gear position. Pull the shift cable medium-snug with needle nose pliers and attach it to the derailleur.
5. Test shift and see how it goes. You should have two "click" positions for the middle ring.
6. Set the high gear limit screw.

When a front derailleur just doesn't seem to want to work, its usually because the starting position is wrong and everything else indexes from that point.
re: 105 triple front gear setup.....Chen2
Jul 11, 2002 6:00 AM
Spoke Wrench has it right.
The 105 shifters are the same for triples and doubles.
Shifting from the smallest ring (30) to the middle ring (42)typically requires going to the second detent (click stop) to get the chain to climb up on the middle ring.
There are 4 shifter positions, one for the big ring (52), one for the small ring, and two more on either side of the middle ring. The two middle detents may be used to eliminate chain drag on the front derailleur.
~Al