Shimano STI brifter: extra click?

Alan Hoyle said:

I recently bought a road bike with a double crank and Shimano Ultegra brifters. When I shift from
the small to big chainring, it takes two clicks. If I do both clicks at the same time, the shift
is super smooth. If I do them separately, the chain grinds until I do the second click. When I
shift from the big to the little, it only takes one click (and it's smooth). Was my bike set up
improperly or something? If not, what's with the intermediate shift?

-alan

Hehe. I asked exatctly that same question about a year ago. Don't worry it's a feature. Or in other
words it's a trim function. You can trim your FDR to not rub against the chain when you are
starting to cross
it. Ie big ring fairly big cogs, small ring fairly small cogs. I noticed it in the beginning
and haven't thought much about it since. I guess in normal gearchanging you don't really
need it much.

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Since the Ultegra shifters (unlike the Dura Ace) are the same for both the double and triple front
derailleurs, I think that what you are seeing is the trim shift normally used (and needed) for
trimming the middle chainwheel with the triple.

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Quoted message said:

I recently bought a road bike with a double crank and Shimano Ultegra brifters. When I shift from
the small to big chainring, it takes two clicks. If I do both clicks at the same time, the shift
is super smooth. If I do them separately, the chain grinds until I do the second click. When I
shift from the big to the little, it only takes one click (and it's smooth). Was my bike set up
improperly or something? If not, what's with the intermediate shift?

-alan

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Alan Hoyle - [email hidden] - alanhoyle.comalanhoyle.comOpen ↗ "I don't want the world, I just want
your half." -TMBG Get Horizontal, Play Ultimate.