Sora Components, Front Derailer, Must shift 2 times to shift to large chainring
I've got a multi part question, forgive me if this is naive. I have had very good experiences with this forum.
I have Sora components on a Lemond Cyclocross bike.
1) My left/front shifter says "Shimano Sora Flightdeck TRIPLE". Yet I only have a double chainring. Is this a problematic situation? Triple shifter vs. double chainring?
2) I've been having lots of click noise in my bike although I seem to have the solution somewhat. In order to shift to the large front chainring I need to push the brake lever not once, but twice in order to get it in place to shift. This is a hassle and while I am used to it I certainly don't want to spend the time moving that lever two times. It makes my shifting far less efficient especially because I really avoid the small chainring.
How do I move the front derailer so that only 1 push of the lever puts it in the proper position? Is the problem generated by the Triple Shifter vs. Double Chainring? Thanks, MM
Are you pushing the shift lever all the way across, or just to the first click?
On my 105 double, the first click moves the derailleur a little bit and lets me trim it for those times when I need to temporarily cross chain - stops the chain rubbing on the derailleur. The second click moves the chain to the big chainring. Or, a single move of the lever can take the chaing straight to the big ring just by pushing it further across. I think this is the way all Shimano doubles work...
Serotta Fierte and a 1989 Centurian Prestige (plus, various others)
Somewhere yesterday on this forum I read that for a triple shifter to work on a double chainring, you should use the small and middle chainring selections on the shifter.
So when it's set up, with the cable loosened, you click the shifter as if it's on the small chainring of a triple. Then tighten the cable. Set the limit screw on the FD so it can't shift past those two rings on the outside.
Because the shifter is designed to work with a triple or double you have more clicks than you need. You can use the extra click if necessary.
It sounds like you may have some slack in the cable, try this:
Detach the cable at the front derailleur (make sure you know the correct way to attach it.)
With the cable loose flip the small shift lever several times while pulling the loose end of the cable, this is to make sure you have all of the cable out of the shifter. Pull the slack out of the cable while attaching it to the derailleur. Try shifting with the bike on a stand. You should be able to shift to the big ring with one full swing of the large shift lever. If it still does not make it add tension to the cable by turning the barrel adjustor out, counter clockwise while veiwing from above. Adding tension forces the derailleur to shift up quicker.