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Gears in the drivetrain of a bike.

12 votes

Can you shift both the front and back gears simultanously?

If you shift both the front and rear gears at the same time, then you will not have any tension on the chain shifting down or too much if shifting up. …
zenbike's user avatar
  • 30.1k
6 votes
Accepted

Efficient gear shifting

The "Spinning is winning" concept is only partly about when and how you change gears for a given situation. … This can only be accomplished by shifting your gears efficiently. …
zenbike's user avatar
  • 30.1k
8 votes

What is the simplest way to lower the gearing on my touring bike?

The simple answer is that there is no simple answer. You have a triple, and a decent gear range on the cassette, so there is no obvious direction to go which you can use to say, "This is the right way …
zenbike's user avatar
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8 votes
Accepted

Difference between Shimano HG51 8-Speed Cassette and Shimano HG50 8-Speed Cassette

They are fully compatible, assuming the number of gears is the same, and that you buy the appropriate match to your bike. The road version is Tiagra 8 speed. …
zenbike's user avatar
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1 vote

Does gear ratio affect Power?

No, gear and gain ratios do not affect power. While you are correct in assuming that it would feel different to the rider, if the other three variables are equal, then the power rate will be the same. …
zenbike's user avatar
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4 votes
Accepted

Are faceplates for different shimano brifters compatible?

Short answer: No they are not. Each model, and usually each year requires a specific face plate.
zenbike's user avatar
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1 vote
Accepted

Converting downstem shifters to barcons

If they are both friction shift sets, there is no conversion necessary. Just new cables, and placing the new shifters on the bar before routing the new cables. Difficulty might be finding good qualit …
zenbike's user avatar
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3 votes
Accepted

SRAM force rear shifts go in the wrong direction when on largest cassette

If your rear derailleur is in the 28t cog, there is only one click available, because shifting to the next (non-existent) cog would put your chain in your wheel. Because of the way the Double Tap le …
zenbike's user avatar
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3 votes

Constant / maximum set load bike? Does it exist?

Shimano's Alfine Di2 electronic shifting system for hybrids has some ability to shift automatically, although I don't know if it is load adjustable.
zenbike's user avatar
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8 votes
Accepted

What is the impact of changing to a smaller chainring?

I would consider changing your crankset to a true compact, 50t/34t, and running an 11/25 rear cassette. Campy actually made a specific derailleur for running a compact front, because they said that …
zenbike's user avatar
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1 vote

Will 10 speed cranks work with an 8 speed freewheel?

First, to answer the question asked: you can use them physically, but the shifting performance will suffer. Second, there is no limitation on the wheel, for a campy 8 speed hub. Put a 10 speed campy …
zenbike's user avatar
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7 votes
Accepted

Is my front derailleur angled straight?

That derailleur appears to be rotated so that the "tail" of the derailleur plate is too far from the frame. The ideal is to have the inside plate be parallel to the chain rings, and have the bottom e …
zenbike's user avatar
  • 30.1k
1 vote

Indexing issues on new build, shimano 105 5800

From the sound of the issues you are describing, I expect your derailleur hanger is misaligned. When troubleshooting rear derailleur setup, these are the basic steps. (I know you said you've checked …
zenbike's user avatar
  • 30.1k
2 votes

Can I fit a cassette with a larger range with my Shimano Tiagra 10-speed ( GS-4600) derailleur?

You are correct. You have answered your own question. A 30t cog is maximum for the Tiagra derailleur. Using anything larger risks damage to derailleur, derailleur hanger, rear wheel and your frame, …
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