What's with this STUPID "half-shift" thing?
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What's with this STUPID half shift thing?
Everytime that I change to the big ring I have to do this stupid "half-shift", I would have no problem with this but it is so touchy that everytime I ATTEMPT to do this half shift, I down shift on accident. It is really frustrating to be ready to groove in the big ring and this happens. I have a 105 dr and a tiagra fr, as well as, tiagra shifters, does 105 or Ultegra have this problem? Is there anything that I can do to make it not as touchy now?
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I have ridden 105, Ultegra and Dura Ace and this never happens to me. I'm wondering - you're trying to upshift your FD but you accidentally downshift the FD? That sounds puzzling. Are you sure this isn't an error in shifting on your part?
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It sounds like the RD is out of adjustment. The low limit screw is too tight and the tension is just a hair loose. Jus a guess without seeing it for myself. I've never heard of half shift.
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Its called trim and is used to stop your chain from rubbing when you cross chain a little. All levels of shimano bifters have this feature. I think campy has it as well (not sure on that). The only thing you can do is get used to using it.
#5
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This is not a problem, it is a function called trim. Basically, when properly adjusted and operated correctly, this function will allow you to make minute adjustments with your front derailler in order to avoid the chain rubbing the cage.
A double shifter has 3 positions and 2 clicks - a triple has 4 positions and 3 clicks.
55/Rad
A double shifter has 3 positions and 2 clicks - a triple has 4 positions and 3 clicks.
55/Rad
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Originally Posted by 55/Rad
This is not a problem, it is a function called trim. Basically, when properly adjusted and operated correctly, this function will allow you to make minute adjustments with your front derailler in order to avoid the chain rubbing the cage.
A double shifter has 3 positions and 2 clicks - a triple has 4 positions and 3 clicks.
55/Rad
A double shifter has 3 positions and 2 clicks - a triple has 4 positions and 3 clicks.
55/Rad
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Originally Posted by mike9903
Everytime that I change to the big ring I have to do this stupid "half-shift", I would have no problem with this but it is so touchy that everytime I ATTEMPT to do this half shift, I down shift on accident. It is really frustrating to be ready to groove in the big ring and this happens. I have a 105 dr and a tiagra fr, as well as, tiagra shifters, does 105 or Ultegra have this problem? Is there anything that I can do to make it not as touchy now?
Maybe the front derailer just isn't set up properly to make trimming adjustments as front derailer adjustment can be quite finicky. Sometimes I find that I was in the lower trim position all along so what I sometimes do is to trim UP first just to make sure I was in the upper position before trying to trim down.
Regards, Anthony
#8
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Originally Posted by mike9903
Is this something that I can adjust?
https://www.sheldonbrown.com/derailer-adjustment.html
55/Rad
#9
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I should preface that last post by saying your system may not need adjustment at all - maybe it's you. I'd take the bike to the shop and have them check it out on a stand and show you how it's supposed to work. If it needs adjustment, they can do it right there and if not, you'll get a demo of how to work it correctly.
55/Rad
55/Rad
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After looking over that site and reading through I have decided to just take it to the shop and let them look at it as well as show me how to fix/operate this.
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I took my bike in to an old timer local shop guy and he informed me that I will need a new shifter lever because I had more clicks than chainrings! I laughed and never took my bike to be tuned there again!
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Well I guess there's no need for me to chime in Mike (I was going to say trim too)....hang in there dude, your shop will make it right.
Cheers,
Brian
Cheers,
Brian
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I've noticed that trimming from the big ring down takes some finesse with the little lever. It's easier to finesse it by pressing the little lever at the very end instead of on the fat part of the lever.
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The trim thing really screwed with my wife at first. Took her a few months to get it sorted.
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Regarding half shifts, is it normal to have to click twice on the left brifter to change up to the large ring on the FD? If not, which adjustment needs to be made?
Cheers!
James
Cheers!
James
#16
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I've been trying to figure this out myself. Often, not always, I have to shift twice to get from the small chainring to the big chainring. It has been adjusted, but it still does it sometimes. They told me that the "trim" feature was the cause. But it is unpredictable. Sometimes it clicks right in, sometimes I have to shift twice. It's frustrating because sometimes when I need a nice, fast, clean shift, I have to double up.If someone tells me this is normal (which I'm beginning to think it is) I'll just live with it.
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I think, if it were my bike, I'd change the FD shifter to friction (bar-end, perhaps), so you'd have a simpler time of chosing either "here or there" and instead of futzing around wth "trim" you could make those minute adjustments manually. It would also end the problem of accidentally shifting whilst braking.
This is something I'm looking into, myself, as I hate the brifters (I have little kid hands). I have massive problems with accidental shifting while braking, and sometimes can't tilt the shifter lever over enough to shift properly.
Brifters may well be wonderful for many people, but for some of us, they are a bad match.
This is something I'm looking into, myself, as I hate the brifters (I have little kid hands). I have massive problems with accidental shifting while braking, and sometimes can't tilt the shifter lever over enough to shift properly.
Brifters may well be wonderful for many people, but for some of us, they are a bad match.
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Originally Posted by Equinox
If someone tells me this is normal (which I'm beginning to think it is) I'll just live with it.
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Ok, I sometimes have to click twice to drop to the small ring (one click is the trim and the second click drops it to the small ring) but I can usually achieve both clicks in the same lever stroke. However, I never have to sweep the large lever more than once to change up to the big ring. If someone does, it seems like the cable tension is not tight enough, no?
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Trim feature it sounds like to keep the FD from rubbing the chain. Wonderful feature to keep your chain noise eliminated!
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Originally Posted by cydewaze
Ok, I sometimes have to click twice to drop to the small ring (one click is the trim and the second click drops it to the small ring) but I can usually achieve both clicks in the same lever stroke. However, I never have to sweep the large lever more than once to change up to the big ring. If someone does, it seems like the cable tension is not tight enough, no?
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For a long time in the beginning this happened to me. I would be in the big ring and try to trim down one click and I'd drop it into the small ring. It takes a while to get a feel for the touch...you'll get used to giving it just the right amount of pressure.
That said, do make sure that you're actually shifted all the way up and not already in the trim position. You can tell by how much "give" the downshift lever has when you press it over (but don't shift). If you're all the way up and press the lever over lightly, it will travel a short distance before the point of resistance (just where the shift is about to happen if you press farther). If you're in the trim position and press it over lightly, it will travel a bit farther before you hit the resistance.
That said, do make sure that you're actually shifted all the way up and not already in the trim position. You can tell by how much "give" the downshift lever has when you press it over (but don't shift). If you're all the way up and press the lever over lightly, it will travel a short distance before the point of resistance (just where the shift is about to happen if you press farther). If you're in the trim position and press it over lightly, it will travel a bit farther before you hit the resistance.
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Originally Posted by corny
Regarding half shifts, is it normal to have to click twice on the left brifter to change up to the large ring on the FD? If not, which adjustment needs to be made?
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Originally Posted by As You Like It
This is something I'm looking into, myself, as I hate the brifters (I have little kid hands). I have massive problems with accidental shifting while braking, and sometimes can't tilt the shifter lever over enough to shift properly.
Brifters may well be wonderful for many people, but for some of us, they are a bad match.
Brifters may well be wonderful for many people, but for some of us, they are a bad match.
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Originally Posted by AnthonyG
I'm guessing that you understand what these half shifts are about but when you try to do a half shift down from the big ring to align with the larger sprockets/lower gears it drops to the middle ring instead. Yes/No?
Maybe the front derailer just isn't set up properly to make trimming adjustments as front derailer adjustment can be quite finicky. Sometimes I find that I was in the lower trim position all along so what I sometimes do is to trim UP first just to make sure I was in the upper position before trying to trim down.
Regards, Anthony
Maybe the front derailer just isn't set up properly to make trimming adjustments as front derailer adjustment can be quite finicky. Sometimes I find that I was in the lower trim position all along so what I sometimes do is to trim UP first just to make sure I was in the upper position before trying to trim down.
Regards, Anthony
-D