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105's shifter setup question?

Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

105's shifter setup question?

Old 07-04-08, 08:34 AM
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tmass
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105's shifter setup question?

I took my new Trek Pilot 2.1 out for its first descent ride this morning, about 27 miles. Wanted to go further but the thunderstorms chased me in literally. The Terry liberator Y gel saddle feels like its Goldilocks choice not to hard; not to soft. But I digress; My 105 shifters on the right the black shifts up in gears and the outer silver shifts down but on the left the black shifts down in sprocket and the silver shifts up. Is that normal? or did the LBS set it up wrong?? It seem like it would be consistent to have both blacks shift up and both silvers shift down. Maybe its something I need to get used too.
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Old 07-04-08, 08:40 AM
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yes its normal. They are the opposite.
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Old 07-04-08, 08:40 AM
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The reason for this is that each derailleur has a spring in it that pushes it toward the smallest cog. The long lever on your shifters pulls cable against the tension of this spring to move into bigger cogs, while the short one just releases tension to let the chain go to a smaller cog. You can feel this in their action, the long one is actually doing some work, the short one is just releasing a ratchet. Because a smaller cog is an upshift in the rear and a downshift in the front, they seem to work in different directions.
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Old 07-04-08, 08:47 AM
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That for enlightening me on this. Of course if I was Emperor of the World I would have logically....
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Old 07-04-08, 09:15 AM
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Yeah I wish it was more logical.. (inner for upshift, outer for downshift), but it's just the one of the ways of the world. I just have to remember that little = smaller sprocket, large = bigger sprocket, and figure out the math on the fly.
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Old 07-04-08, 09:28 AM
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well, if you use a rapid rise dérailleur...
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Old 07-04-08, 10:03 AM
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Big Lever = Bigger Gear
Also
Big Lever pushes the chain in that direction.
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Old 07-04-08, 10:42 AM
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Actually Hummeth that makes sense and probably what i will remmeber until it becomes 2nd nature.
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Old 07-04-08, 11:04 AM
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Originally Posted by Hummeth View Post
Big Lever = Bigger Gear
Also
Big Lever pushes the chain in that direction.
Yup, that's what I tell people to think when they first get on a road bike.

It also makes sense to push the same levers when you shift both front & rear at the same time and want to keep near the same cadence & pedal effort.

Say that you're in the small chainring but want to shift to the big ring and don't want to suddenly have to pedal a lot slower or mash harder. You'd swing the left lever to shift to the big chainring and swing the right lever all the way through one stroke, usually through three clicks and three rear cogs, and you'll end up with nearly the same gear ratio you had before.

Or, if you downshift the front to a small ring, just flick the small right lever three times to get about the same gearing as before the shift.

I often shift both shifters at the same time, or at least really close together. You'd see me swing both big levers inboard at the same time.
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